Hi, I just wanted to know if I should be concerned or not. About 3 and a half weeks ago I had sex, used protection and I'm on birth control, i haven't taken it every day at the same time, and I took 2 pregnancy tests a couple days ago and they showed up negative, so it was about 23 days after sex. Don't know if that's too soon or not, I have a little bit of cramps and some yellowish brownish vaginal dis charge..don't know if that's Normal or not..