Do I need to call L&D? 36&3

I am at work (last day before leave) and I’ve been walking all day. Very slowly and taking it very easy. This morning before work, I felt sore. As soon as I started moving around at work, I have had bad back pain with flare ups of pain and constant horrible pressure. TMI I keep feeling like I have to take the biggest poop of my life and when I try going I just get little poops.. I have been having tight cramps in my belly and so SO much pressure as I already know little guy is very low. I just lost my mucus plug two days ago. No bleeding. So to summarize, I have constant back pain with flare ups of pain and cramping in my belly and terribly pressure. What should I do ☹️ I am absolutely miserable!