Lower right side abdominal pain?

Nikki • Married 👨‍👩‍👧 Mommy ttc #2
Hi ladies! Hope you all had great holidays- I woke up yesterday with bad pain in my right side starting below my ribs on the back and sort of circling around to the front of my hips (did that make sense?) it doesn't hurt when I'm walking, standing or sitting but when I lay down- good lord help me! I was hoping it would pass during the day, but when I went to sleep last night I kept waking up with the same awful right side pain. 
Baby girl has been hanging out really low between my hip bones so I'm thinking maybe she's stretched out?
 I don't know but any suggestions would be helpful! I don't want to go to the ER for something silly. I don't have cramping or bleeding just this awful right side pain when I lay down. I'm 22+5 today. 
Thanks!