Hi... I am 17 and I last had sex on 23rd March this year. Since then I have had five normal, heavy periods. I finished my fith one on 9th August and it's been 8 days since I've finished and I noticed this morning there was a small amount of blood in my discharge. I am very worried because I don't know if this is implantation blood or what?.... I thought there is no way I could be pregnant if I've had five periods since unprotected sex but now I am worried... Please help asap!! I am really worried what this is....