Round ligament or what?

Na

This is my 3rd pregnancy and I’m 16weeks so you’d think I’d be used to symptoms by now.. But I’m not 🤦🏼‍♀️ I’ve had a pressure like pain in my lower stomach all day, I went crazy on vacuuming and laundry yesterday so could this be my muscles sore or what , I’m really paranoid since I had a stillborn in October and I’m trying not to call my doctor for every little thing because I’d probably drive him crazy, anyone else have this? I found baby’s heartbeat on the doppler and I’m not bleeding thank God !