Ok so on Monday (18th aug) I had unprotected sex. Since then I have been having really uncomfortable painful sharp pains in my pelvic area, had stomach pains which feel like dhiarrea pains but I haven't been releasing any dhiarrea and I have also been feeling the need to constantly be sick after I eat. My mood swings have become more aggressive towards people without helping and I have been feeling the need to sleep more. Also I have been having stomach cramps which make me feel like my period is coming but my period isn't due for another 11days. Is there a chance that I could possibly suffering with implantation pain?