Pelvic girdle pain?

Im 27 weeks pregnant, and have had the usual pelvic and back pain. But I'm experiencing something on a whole other level today.

I went for a walk on Wednesday and ever since then my glutes have been sore. On Friday the soreness became a sharp pain in my left buttock and by the end of the day it was hurting to do things like get up from the couch, get dressed, bend in certain directions. I woke up yesterday (Sunday) morning and it was pretty painful but I was able to walk still. My husband and I had sex, and ever since then the pain has been progressively getting worse. I was on the couch or in bed all day yesterday, but able to move after using a heating pad.

Now, I've been up since 1:30 am with this pain that is almost unbearable when I do simple movements like rolling over or getting out of bed. I just tried to stand up and I couldn't walk because of the pain. My husband works nights so I'm home alone every night. I can't imagine how I'm going to do this every night because I'm literally laying here at 3:30 waiting for him to get home to help me out of bed.

Does this sound like pelvic girdle pain to you guys? I'm waiting to hear back from my doctor.