Even after a good scan result - why does everything seem scary or is it you just feel you keep getting thrown curve ball?

Ok, I had my dating scan today baby was there - heartbeat 126, measuring 8mm and 6 weeks 5 days so one day out....

But of course I got to this stage last time so while it was good it won't stop me stressing

Other issue for me at the moment is I had a colonscopy in May following some bits of bleeding on TP (I know TMI) which was all clear and occassionally, I still get it. I am upping dosage of metamucil and trying to eat ore fruit and veges but phew, I just don't want any more stress.

Has anyone else had issues like these?