Period two days late?

My boyfriend and I have had unprotected sex 5 times this months.. on the 4th, the 8th, the 11th, the 15th, and the 18th. We are always very careful, however, and he makes sure we stop when it first starts to feel good for him so there is no chance of him ejaculating inside of me. We also almost never do it more than once a day so there is no real chance of pre-*** containing sperm from previous bouts. My period was due on the 19th/20th and my cycles varies between 24 and 28 days.. but it has never gone over that. I usually have tender breasts a couple days to a week before my period, I get gassy and have diarrhea a couple days before, and usually have some sort of tinted discharge the day before I start. This time however, my breasts were tender 3 days before my anticipated start date and I didn't start to feel gassy until today. What worries me is that there has been no tinted discharge like there usually is. I plan to take a test soon but I was wondering, am I just being paranoid?