What happens during an episode of OCD?

I’m not sure if this is ocd but sometimes I’ll just be doing literally anything and my brain will be like what if this this and this happens and it’ll be like so random like an example id be like walking home and id be like what if my whole family got k!lled in this really brutal way and it’ll have nothing to do with anything im doing ill just get a really vivid thought of something horrible happening and it freaks me out every time and sometimes I just have random ones about like me like having a whole scenario of me singing in front of my whole school and everyone loving it (I can’t sing) sometimes the thoughts are just intrusive thoughts or somethings they’re like full on daydreams where there’s like a whole plot to it like even the bad scary ones it’s weird

Does anyone that is diagnosed have experience having different themes come up in a day? It’s like I ignored one thought and then my mind comes up with another one until it figures out one that is scary enough for me to ruminate. Does it ever make sense? Like today my intrusive thought was an image of me in the space or falling into space which made me also think - this is non sense! Am I going crazy for having such an unrealistic intrusive thought? And then my psychosis OCD comes to play 🫠 it’s EXHAUSTING but I’ve been answering with “maybe or maybe not” and “I don’t care” which is something I saw someone saying that helps and I’ve been using it. I haven’t started ERP yet but hopefully soon. Just this year this came up and I still catch myself feeling so sad and remembering how I was before this. 😭

Ive had severe OCD for like 3 years now but today I had a moment where I was convincing myself of my thoughts really strongly and I started ro believe it- but it was really bad this time. Like I felt so anxious that I got nauseous and I felt like I was about to vomit😭😭😭 that has never happened to me… does anyone have a similar experience?