What do you do when an old theme is coming back?

I am adding a trigger warning, but I’ll still be mindful to censor. So I guess I would say I’m in a relapse. I was doing well (I think). I wasn’t having intrusive thoughts and I overcame a really hard theme. So for a few months I was doing pretty okay. My living situation and relationship took a huge hit and I guess I couldn’t handle the pressure idk. Anyway, one day I was trying to sleep and I got this intrusive thought about losing my mind I guess. Not being able to identify anything, speak, ect. Just being a blank mind or something. (I know, doesn’t my one ounce of sense to me either) Anyway, this really scared me, triggered me so badly that one of my old themes that I truly thought I had overcame came back. Not only did it come back, it sent me spiraling ( still am). It feels so much worse this time. And I’m struggling to overcome it. This thought: “how do we understand words?” And then it’s spirals into other thoughts related to this, but I’ll leave it at this. I can’t cope, my mind is hyper fixated on every word, not just mine. I can no longer watch tv comfortably, listen to conversations, or even speak myself. It’s making me feel like “unaliving” myself. I feel extremely alone in this. Like as if I’m the only person in the world to ever think this or struggle with this kind of theme. Getting some feedback would be great, but I won’t hold my breath.

So I’ve been in a pretty rough spiral/ocd spike for about a month now. I used to have this theme of being severely mentally ill or schizophrenic or psychotic and it went away for like 6 months and now it’s back full force. I have never hallucinated but I have this intense fear of what if I do. So with this theme I have these delusional thoughts that are just bizarre and I know how delusional they are but they feel so real and scary like I believe them. My body reacts by my stomach feeling uneasy and I’ll get a chill and just feel like I’m gonna be sick. Sometimes it doesn’t even have to be a thought per say.. it can just be a weird sensation or feeling and then I’ll become extremely anxious and borderline feel like I could panic. I can usually talk myself down from a full blown panic attack and but it’s just so distressing and I’m wondering if anyone else goes through this? I think it stems from a core fear of losing my family, ending up institutionalized away from my family and my family being devastated and judging me bc I “went crazy” please if anyone else can relate I’d appreciate any advice.

I hate that ocd not only latches onto people/things you love. But I hate how easily triggered it can make you and compare yourself to actual scary/bad people. TikTok has been such a big trigger of mine because I keep seeing crime cases, people harming people/younger ppl, and my most recent trigger someone potentially harming their pet. When I see all these things my brain tries to make connections to my past actions/things I said/ etc to try to find connections to how I’m also bad like them and I should just end it all before I truly end up evil. It scares me I don’t want to be an evil person or bad or worse things. I’m not like those people but my brain says other wise. How do I combat this? I can’t stop thinking about my latest trigger because I feel like it’s an old theme resurfacing and I’m so scared-please advice? Explanations? Why does this disorder exist?