How to relax?

I'm almost 18 weeks with my rainbow after 3 losses. No living children. I usually feel pretty positive about the pregnancy but the bigger I get, the more worries I feel. Nothing has really felt dangerous to the pregnancy but I'm starting to feel growing pains here and there. And they aren't bad. Just an uncomfortable sensation mostly. I'll do anything to make sure we are safe. Its just hard to completely let myself relax. Even the leukorrhea has been pretty persistent. I know its normal but plenty of discharge can be dangerous. I just am looking for a ways to feel more comfortable. Any success stories from ladies who made it full term with their rainbows after storm after storm?? Thanks!