I'm 15 recently lost my virginity on the 4th of April and I'm now worrying about pregnancy. My boyfriend did not wear a condom but he also didn't cum as I made him stop almost straight away from the pain of it all. My period was supposed to start on the 15th and I got it today (the 16th which is also day 26 of my last cycle)  however I was wondering if this wasn't my period and instead was implantation bleeding. I had terrible cramps and back ache as soon as my period started but I've had nothing since them first couple of hours and my periods been quite light but still red ... I don't know if this is me worrying over what is not necessary but any help would be highly appreciated, thanks xx