Hi I'm a 19 year old girl and I recently had sexual intercourse with a new partner. We started off without a condom and then half way through he put a condom on. After sex I realised a huge amount of blood over myself and my partner, which was scary. I haven't had a period for over a year as I have the implant in my arm for contraception. What could this blood mean? I didn't bleed afterwards at all, could the blood have come from him? Thank you x