should I be worried?

Currently 25w 3days so Friday night 1/27 I was In a lot of back pain and I felt like my uterus was going to fall out. I took a Tylenol and the pain went down so my husband and I had some sexy time. We finished and I went to the bathroom and noticed blood covering the toilet paper. I freaked out but calmed myself down bc I spotted every 4 weeks until 14 weeks. Next time I used the potty i barely wiped any pink. Woke up yesterday morning and my discharge was tinged pink again. I would say about 80% of the time I feel like my uterus is going to fall out and I'm always constantly cramping. The other 20% I'm sitting down or asleep. The pink has stopped again. I've called my doctor and left 4 voicemails over the course of this week and she has yet to get back to me. I can't seem to ever catch her to actually pick up the dang phone. Should I be more concerned and go get checked out at the hospital or continue to call my doctor until she calls back? Or am I just freaking out over nothing?