I and my bf mutually masturbated around 27th march (4 months back). We took care his right hand only touched my vagina and not his genitals but we fear somehow his right hand might have touched his penis which may hve some ejaculatory fluid which might have got transfered into my vagina. I got my normal periods on 17th april, 17th may and 21st June but my periods of july month is not due yet and its already 12th august i: e delay of nearly 23 days. So my question is that are there any chances of pregnancy? Since I already got 3 normal periods I feel there is not any chances of pregnancy though I fear as to what is the reason for such big delay since we had no sexual contact ever since. Please reply asap and also kindly explain possible reasons for delay. thank you.