I had my last period April.2 then on my fertile days April.15 & April.16 my SO and I had sex multiple times and he finished in me every time. Since that time I had minor cramps, backache, boobs really sore and all this was consistent. It never stopped. I took 2 HPT before my period was due and I knew it might have been too early and they both were negative. My period was due May.2 I had nothing all day and all of a sudden at 8:30pm I go to pee and I wipe and there's some pink-ish blood. I thought my period was starting so I put on a pad thinking it will get heavier. Since May.2 8:30pm till now (about 18 hours) I am still bleeding but it's not sticking to the pad, it's only there when I wipe. I have cramps now but not like my period cramps. My lower back and my hips hurt the most right now. I've never had a light period before, when it came it just came down heavy the first 2-3 days. So I can't tell if this could be Implantation bleeding. I really want to test but I'm waiting to stop bleeding. Has anything like this ever happened to anyone before? Could I still be pregnant? 

Anything would really be helpful! 

Thanks😌