Though you had forgotten your pill you had taken two on the next day and after that you didnt had any intercourse. Well i would first like to know when was your last menses and whether it was a normal flow or not. If you are near the mid of the cycle you have to take precaution. i think you should use a barrier method for the rest of the month. Also if your pills are regular OCPs, you need not worry but if they are the low dose progesterone
containing ones, they may pose some problem.Light pink discharge can be from many causes and dont worry until you miss the next menses.If the next menses are overdue by 1 week or more ,go for a urine pregnancy
test or a pelvic ultrasound
.good luck bye.