Uterine cramping

K

So I've had very light brown to light pink spotting since Sunday when I got my bfp, mostly when I wipe but it's on my underwear at times. And today I'm having some moderate discomfort that comes and goes in my uterus, like a pulling?. Anyone else have this at 4 weeks? I had a subchorionic hematoma with my 2nd pregnancy and it lasted until the second trimester. I would bleed constantly. I really hope it's not that or an ectopic. Any insight?