Rock hard spot at top of uterus

Br

Hello all! I’m currently 30 weeks and 1 day pregnant with my first baby and I’m just curious if anyone else has experienced a super hard spot at the top of their uterus (between ribs)? It seems like it’s just getting bigger and I only realized it in the past 4 weeks or so. I thought it was baby at first but it’s definitely not, my guess is it’s like 1in wide and 2-3in long. My current doctor is useless and I’m in the process of finding another, but wanted to see if others have had this in the meantime. Thanks in advance!