Okay so I did oral with a guy and he put his dick in me for only a minute so I thought I was good (I'm not sure if he pre came in me or not or maybe had his cum on his fingers and put it in me) and I had what I thought was my period a week earlier than usual 15 days after the sex. I have had cottage cheese looking stuff in my discharge and am 6 days late on my second period. I have had cramps in my inner thighs and head aches and fever. Could this just be a yeast infection or pregnancy?