Hey skybie do you have a number for the hosp you can call anytime if you are worried. It just might be because of the extra weight you are carrying but its better to get it checked out than stay putting up with it. Im no doc but would be a good piece of mind to get it looked at just to be sure and Im sure you would want to know whats causing it.
I know with my hosp I have a number for the midwives and i can call them and if they seem worried about what I tell them I can go in for a check up.
You are not being a wuss pregnancy brings on many issues just get it checked hon thats the only advice I can offer
take care sweetie!!!