Suspected pregnancy

So I’ve been pregnant before but it’s been awhile so I don’t remember much of the early days of pregnancy. Has anybody been pregnant but had a heavy period for the first month or so? I’m excessively tired and overly emotional, along with some pressure in my pelvis making it feel like I always have to pee. My mom thinks I am, but I’m not sure. I took a test about a month ago and it was negative. I haven’t had sex since July 5th but I came off birth control July 29th, so idk what’s going on