Sharp chest pain in between my breast

Tas

I felt this sharp pain in between my breast, right where you can feel the bone last night. It left and came back with a vengeance. There’s no shortness of breath, just this extremely sharp pain, almost as I got punched or stabbed right in that spot. I’m 21wks. The on call Dr recommended a take a Tylenol and go to the ER if that did not help. Obviously, hearing the potential need to go to the ER does not help calm the nerves, has anyone had this experience and how did you proceed? I know the farther along you get in wks the baby can push up on your ribs, so I just don’t know what to think. Thank you in advance!!!