Can your sexuality change in your late 20s? just so feed up with this now just want to life my life

Sort of a rant that probably sounds stupid and I’m kind of seeking reassurance… I’m still a relatively young teenager so I know I’ve got time to work all this out but I’m really confused about my sexuality. (I’m a girl) I’ve never been in a relationship (I don’t know if I want to be which is why I’m writing this) and sometimes I feel like I’ve never really had a crush and I just convinced myself that I did because I wanted to feel normal… but then maybe that’s false memory ocd??? I don’t really want to be in a long term relationship with a guy and idk about girls but idk if that’s just cos of my age??? Some days I hate the idea of ever dating, marrying or doing anything sexual. Other days I wish my mental / physical health was better so I could date someone! Everything I feel goes up and down a lot and idk why!? I have bad sexual intrusive thoughts that make me unsure whether anything that I think is real and my parents recently split up after not getting along for a few years. I don’t know if it’s my age, my ocd, my parents bad relationship, my sexuality (am I attracted to guys, girls? Am I ace!!!!???) Or something else but I have no idea who I am and I KNOW I’m young and have time but some other perspectives might help???? Can I ever be in a relationship if I have ocd like this? Also I’m really struggling not to compulsively seek reassurance and I don’t know who to talk to about all this irl I know I probably shouldn’t share this with random strangers but also idek if I care anymore 😭

I’ve tried accepting the uncertainty, I’ve accepted I may be gay, bi or still straight. I’ve tried doing ERP myself to the best I can. When I accept that I’m gay or bi why doesn’t my head agree and move on? Why does it still question it? I know I don’t want to be at all. I love my family. But I just want this to move on. I want to enjoy life. Why can’t I find women attractive again? (Brief moments I do). I seriously don’t understand the false attraction? I’ve tried agreeing with it but it won’t let this drop. Why am I attracted to the same sex? Why am I attracted to people I would never thought of looking at? Why does it give me such grief about this? I know I shouldn’t look at adult content but why can I only feel good watching either lesbian or females? I tried to agree with the gay but it makes me sick and horrendous I even considered this? I just want my life back.

Last night I took my meds to help me sleep and I kept waking up throughout the night with thoughts like “I’m really a lesbian now” or “I’m ok with it now, this is what I prefer”. I really feel like everyday for a couple of days now, I’ve woken up feeling more and more like my preferences have completely changed. The first few days was major anxiety, panic attacks, then I had a really bad double-bind and reversal spiral, and I became a little bit calmer since then. Now I feel like I’m managing the thoughts without anxiety or panic like I’m used to, but now it feels like I really want them and that I’m ok with it. Like I don’t care anymore. But the thing is, in between all of the mini spiral episodes I’ve had, I had these little moments of clarity like “I’m not giving up on my fantasies of men” or “I’ve always wanted men, that doesn’t just change”. But last night I’ve had really sexual dreams that I’m having trouble interpreting. I had one where I think it was me sleeping with a guy, but I woke up frantically because I think the roles got reversed, but I’m not sure. Another one I was a random woman with a husband, but I think the roles got reversed again so I woke up immediately. Both times it felt like arousal. Obviously I still care somewhat if I’m still here asking, but my brain or maybe me (I’m really not sure anymore) is telling me that I’m a lesbian now and I prefer it. It’s like I don’t care and want it now. It’s like I’m not even feeling confusion about it. I don’t know if it’s because of the meds, I’ve been distracted (family in town), because I’m in maybe quieter stages after two bad spiral episodes, or because I’ve really changed. It’s literally like I think being a lesbian will be enjoyable now but I don’t want that, even if my brain (and body apparently) keeps telling me that. I was told that ocd doesn’t change who you are, but now I’m worried that what I thought was background noise leading up to another spiral was suppressed self discovery (I’ve had two major soocd episodes in my life: late high school and now a few years later).