Scared…can someone reassure me?

I’m scared of being in early labor but I know it’s most likely not happening it’s just scaring me. I am 27 weeks I feel a lot of pressure and pain in my lower belly and my back the last 2 days, I walked a lot yesterday. Also feels like the baby is is pushing with her legs or feet soooo low (she was breach at 20 weeks). I have a midwife appt on Wednesday. I’m probably worried about nothing, this is my second pregnancy and it’s just been so much different than my first.