Pulling stomach muscles 18 weeks

I’m 18 weeks and I wanna say since about 15 weeks there’s been many times I’ve either rolled in bed, or bent down and felt a pulling/ straining feeling in my stomach. It’s been on either side from top of my stomach to my belly button. Pain lasts maybe a minute or 2 then goes away. Is this normal?

Most recent was today. I was laying down flat and asked my husband for a hand to help me up, immediately once i sat up I felt a pain right beside my belly button. It felt almost like a muscle cramp/ spasm.

I don’t remember having this with my daughter, but she is a toddler now and I’m up and down a lot, picking her up and stuff.

I’m so terrified I’m going to like detach my placenta or something.