I'm bleeding from my vulva days after self pleasuring

I masturbated with a dildo (4.7 inches long and 3.5 in girth) days ago, I've masturbated before with the same dildo and I bleed a lot. Every time. Usually I don't see anymore blood after I take a shower and clean things down there. But for some reason I'm still bleeding and it's been days (about 4 or 5 days). It doesn't hurt down there or itch. There are no other unusual fluids coming down from there and no unusual or bad smells. Everything seems perfectly normal except for the bleeding. Its not a lot of blood like when I'm on my period but it's enough for me to notice when I wipe and there are stains on my underwear. My last period ended 10 days ago and everything went normal, the bleeding only started after I masturbated the last time. I know I'm repeting myself but I want to make all details very clear.. Should I go to a doctor? Or is this normal? And is it normal for me to bleed everytime I use a toy? (I'm a virgin btw)