Pelvic pain

I have been having sever pain in my pelvic region, kinda like a cross between period pain and like I have a bruise on both my hips. I took a pregnancy test, because, although I was having period pain, I wasn’t getting my period, and it is positive. I am excited, but want to know if this pain is normal. According to this app, I am 4w6d pregnant. I didn’t know if this pain usually starts this soon.