Need advice: artificial leg and pregnancy

This is my first pregnancy so I don't know what to expect. I'm in my third trimester (27 weeks) and for the past 2-3 weeks I've had trouble getting my fake leg on. (I'm not shy about it so you can ask questions if need be or just want to). Anyways, I am now sleeping with a compression sock on it nightly and it helps a little but the leg is still pretty tight in the mornings. Some mornings so much so that it goes numb until all the fluid goes north due to the tightness of the fake leg.

Any suggestions would be great.

In case you need to know I have gained 25lbs so far and I am at my highest I've ever been.

Thanks in advance.