It's really good to read that other people are experiencing these fears. I am so scared of bleeding and miscarriage, everytime i have the slightest pain or cramp i freak out. I'm trying really hard not to stress because i know it's bad for the baby but it gets tough!
My doctor assured me that sex was ok but i'm definitely having less of it because i'm scared and i think my fiance is a little bit too! we laugh about it though so I'm sure we'll adjust.
I'm scared of tight jeans too! i wear jeans to work everyday and they are already starting to feel a bit restrictive? but i'd feel so silly buying maternity jeans before i even have a bump!
The other thing i worry about is work, i work at a mine site and do 12.5 hour days and then have to find the time to do some exercise to keep healthy for baby and i'm worried i'm going to exhaust myself. it's a pretty full on lifestyle.
Anyway, you're definitely not alone with the irrational fears, it's good to type them out! thanks for the post.