With all due respect, I did not KNOW anything - hence the question. Do you not think that I tried to tell myself this repeatedly before I posted? I didn't just have the thought then start a thread. I've thought about it for days and repeatedly tried to decide whether or not this is rational. The 'this might sound weird' was not because I knew it was irrational - it was because I knew it was something most people wouldn't think about. But the fact that it may not cross others' minds doesn't mean it's not a real threat. Most people don't think about putting sunscreen on every day, but they should.
I didnt continue to seek reassurance after my 2 appointments. I posted the last update on the breast cancer thread in order to reassure others who may be going through something similar that mine turned out to be nothing - I even said that in the thread. Based on your response to my thread (which I've just looked at) I think you misunderstood that. And the reason I had 2 appointments is because I booked a private appointment before my NHS one came through. When it did, my family encouraged me to go to it anyway because they said "doesn't hurt to get a second opinion" - and I'm glad I did because, as I said in my thread, they were much more thorough.
As I said to Fishman - I did not know it was irrational, even deep down. I thought about it a lot, tried to reassure myself and still couldn't decide. Posting here was a last resort, and honestly, I don't think I'll be doing it again. I understand why some might feel being harsh to be kind is the best way to deal with another person, but I really do just feel attacked - and it's not the first time I have felt this way after posting. Despite that, I do actually appreciate the fact that you took the time to respond to me, but if I can now be honest too - please don't assume that you know what someone else is thinking. I'm glad you've managed to overcome your anxiety but what works for you won't always work for others, nor are they going through the same thought process as you did.
Take care.