I have a question...lately, I have been having alot of vaginal discharge, and it is sometimes brown or yellow in color. Sometimes it also has a bit of blood in it...my period is due to come sometime this week. I had unprotected sex in February, but my boyfriend and I used the pullout method...this was the only time I've ever been unprotected. I had my normal period in March..then in April, my period was later and lighter than I expected. What does all this mean?