Can someone give me any advice on how to get through the hard times when you feel like there is truly no hope at all?

I feel like there’s no way out of this. everyday i’m anxious and depressed from these thoughts. i feel like i have to constantly question if it’s OCD or not. the panic attacks are insane and i freak out. and a compulsion i have is looking eveything up on the internet when im stressing to know that it’s just my OCD and im not in danger. but looking things up add on to my thoughts and i start thinking “what if” actual suidcal people think. do others with this theme whenever they do something like if im taking a picture it’ll be like “yeah you look happy people will wonder what happened when your gone” LIKE i DO NOT want to end my life. or even as simple as cleaning my room, “yup keep it clean so when your family goes through your stuff” then i panic and can’t even do anything. those thoughts distress me so bad. i’ll sit there and think how good my life is or when im having a good day my thoughts will be like “NOPEEE what if your just saying that to convince yourself” it never shuts up and genuinely makes me think i have SI or something. i hope this reaches the right people just to know im not alone. Even when i do get better in the back of my mind it’s always “people who want to are the same a day before too” im genuinely scared and im scared one day im going to just snap and do it because its “too much” do i need to go to a mental hospital! i feel insane.

Really bad theme right now is death, I keep thinking about how one day or at any moment my heart will stop my brain will stop & my memories & everything I know will all fade away. It is giving me so much anxiety I’m only 18, but I realize it all happens to us it is bound, we are born to die. I know it’s a silly thing to be scared because it’s not helping the quality of my life worrying about it and even when I do die, I won’t care , if you don’t have a working brain then how can you care 🤷‍♀️. It is tainting my everyday life currently & honestly making me terribly depressed & it is giving me derealization & making me feel nihilistic, I’ll remind myself it’s okay but then with my ocd i don’t stop thinking and thinking about it and it’s seriously so hard to stay present in the moment because this thought just feels like I can’t scrub it away it’s miserable I struggle with religion, but I do pray to anything that’s out there possibly listening, because it is comforting, it just feels like this whole experience Is pointless & I am afraid of the unknown and what is to possibly happen but I’m subjected to it anyways so why should it matter

I’m at the lowest I’ve been I’m in just declining. First time in my life where the thought of ending it popped into my mind. I’m not going to but that’s just how bad it’s gotten. Should I tell someone I know and trust about my mental health battle