My partner and I had intercourse without any contraception almost everyday during my ovulation period. Now i am due to come on my period but instead all i have is very light pink blood spotting once or twice since yesterday. Could this be Implantation? I've also had nausea and stomach cramps the last week or so. I want to wait to take a prgenancy test as i still think it's too early. what do you think? could I be pregnant?