How to deal with OCD/anxiety surrounding an entire month?

Hey all! For context, I'm 17 and have had general anxiety my entire life, so does my mom, but health anxiety specifically is the worst for me. For the past few months it's been really bad, I've been obsessed with the idea that I have a brain tumor and just everytime anything happens with my body I freak out (I think it's been so bad because I am so busy recently, in the junior year stretch before college.) Anyway, my issue is that I've had this long running anxious thought about the month March. That sounds really weird, but it's because it feels like every March something life altering happens to me. Last march, I dislocated my elbow doing sports and had to be in a cast for 8 weeks. March of 2024, I had horrible migraines which I found out were from dehydration. I can't exactly remember 23 or 22, but in general those were tricky years for me. March of 2021, my house burnt down, and in March 2020, the pandemic started. I know logically that bad things just happen randomly, but my brain loves to seek patterns in the anxiety and I think it's so I feel in control of it or something. Anyway sorry if this sounds silly or makes no sense. Just wondering if anybody else has experienced this and how they dealt with it because I don't want to spend the entire month in a state of panic when that's already basically what's been happening with me since around Thanksgiving since like I said I had a bad flare up. Thank you!!