Solidarity! I'm also pushing 60 and I've definitely got worse with age. As another poster said, you become more aware with what can go wrong as you get older, highlighted by all the extra screenings you get offered as you age (a good thing but anxiety provoking). I've also had several 2ww, as have many of my peers and DH just recently (all fine). One of mine was for a lump in my mouth. My dentist is a panicker and the hospital said straightaway it was nothing! Doctors seem quicker to refer when you are older, again a good thing but scary. The well meaning cancer awareness campaigns in the media also don't help those of us with HA.
I used to go to the doctor frequently but am now the opposite as being sent for tests and waiting for results causes so much anxiety. I too get scared to check my breasts, they're naturally lumpy which makes it more scary and have had 2 visits to breast clinic (the GP only sent me as I'm anxious). I now do so sporadically and attend my screenings.
I've done CBT with limited success and also can't take sertraline due to a scary side effect that landed me in a&e. I did take citalopram years ago with no problem but am scared to try again. I've been doing some self help stuff myself which I think helps a bit but I keep falling off the wagon and need to refocus. I'm thinking of trying HRT as I suspect some of this is due to menopause and hormones, but it means going near the dreaded GP 😔
I keep telling myself I'm no more likely to get something nasty than my peers and they are not in this state (AFAIK!) and are getting on with their lives (I think they'd be shocked if they knew about me as I appear fine to the outside world). In fact, I'm probably LESS likely than many of them as I'm fit, healthy, exercise regularly, not overweight, never smoked etc etc but still....
Sorry, my post has probably not helped but hopefully it helps to know it's not just you.