That should have been my first signal something was wrong also, but, I just blew it off. A few months later my mom asked me about a bruise I had on my knee - it had been there so long I couldn't remember how I got it anymore. Then I went in....
I still get petechiae once in a while and my plates have been around 150 for years.
20 years post treatment and I still get annual CBC checks and I confess that I also love getting labs, it is nice to be reassured you're still in the clear. I don't mind at all going to get them, I look forward to it