Hot showers, ,tylenol ,and back rubs always help me(I have a 15month old and I'm 19&1/2weeks pregnant with my second). Good luck. It's all worth it!
unless there is bleeding I wouldn't worry. It's not always fun being pregnant :) but it's all worth it in the end.
I still have lower back pain I'm 21 weeks. It's just her body stretching and growing for the baby. Warm baths and a heating pad on low help me also try tylenol.