Lifted heavy-ish items, now have lower pain

I’m 25 weeks pregnant today. So yesterday I decided I wanted to shift the mattress around in the guest room, well it got stuck so I had to lift it up off the rug, not too high, but just enough to slide the rug out.

Then later I moved a really heavy piece or furniture, I didn’t lift it, I used my body to push it down the hall, it’s an armoire.

But between that time I started feeling discomfort on my lower left stomach side. And when I walk it doesn’t feel normal. I read online to rest and drink water, but has anyone had this happen? Should I call the doc?