Nausea, stomach pain 30 weeks- when to be concerned?

The last three days I’ve had nausea, stomach pain, Back pain, and I think she has dropped because I feel her much lower in the pelvis area. A lot of discharge (tmi, sorry) but not pink. I have had stomach pain and am very tired no matter how much I sleep and have basically stayed on the couch the last few days. I’ll be 30 weeks next Monday. Yesterday, my stomach was very hard and I didn’t even really feel like eating. Not constipated (tmi again😅) and I haven’t had any Braxton Hicks contractions that I am aware of. Is this anything I need to be concerned with or is it normal for 3rd trimester?