Painful braxton hicks??

I am 35 weeks & 4 days. I have been experiencing loss of pieces of my mucus plug(no blood) and what seems like a lot of braxton hicks contractions since about 33 weeks. Recently it seems that the braxton hicks have become a little more than uncomfortable and they sometimes make me feel like something is on my lungs. I talked to my doctor and she didn't say much about it. What do you guys think?