13 weeks and stomach muscles HELP

🖤J.🖤

Tonight I was sitting on the couch, yawned and stretched. Suddenly, what felt like a muscle spasm happened right mid stomach. It was strong enough I felt it push out on my arm and I was bracing for a Charlie horse feeling but it didn’t happen. I am way too early to feel kicks that hard. This is my second and I never felt anything like this with my first, though I had an anterior placenta and could barely feel him my whole pregnancy. I also get a strange feeling when I reach up to hug my husband around his neck. The first time it happened was weeks ago and I legit let go of him and jumped because it felt like someone poked me from the outside. It really freaked me out. Today, going up the stairs earlier I felt that again. It’s always in the same area. Is this something I should talk to a doctor about? I’ve also noticed my stomach is very hard on top. Down below I have some flabbiness from my first pregnancy but up top it’s been hard as a rock for a couple of weeks now. Are things moving up even if baby is still down below since it’s a second pregnancy?