I just want to know if I should be concerned as I have had 2 miscarriages before, one at 12 weeks and the other at 8 weeks, so I am really scared.
Don't compare bumps, it's useless. My neighbor is due in Feb and she barely looks pregnant. Me on the other hand, I get routinely asked if I'm having twins. Frown.
I can understand your concerns with previous losses, perhaps getting a home Doppler would help as you can check on LO and be reassured. Or if you think you can wait 4 to 5 more weeks you should hopefully be feeling them move by then which is an awesome, and free!, reassurance.