Possible blood clot? DVT?

I’ve had a constant pain my leg the past few weeks and it’s just go worse. It feel likes like a cramp but it is getting harder to walk on, and my leg is constantly throbbing. There’s no redness or swelling but it doesn’t feel right to me I haven’t done anything that could’ve caused it, And on top of that I’m 33 weeks pregnant... I just wanted to see if anyone has Dealt with blood clots, what happened and how you knew.

I just wanted to add I have been to ER where they dismissed me, and I went to my regular PCP last week. I’m trying to get in again too