I forgot to take my pill for two full days. how soon can i have intercourse i took my pill on the third day and one pill that i had missed.

It : It depends on when during your period you missed the pill. If you missed the first 1-2 pills at the beginning of your cycle, you need to use a back-up method for 7 days. If you forgot the pills on days 3-21, then you don't necessarily need to use a back-up method. Below, i've attached a really helpful chart that explains what to do if you miss a pill or two or three. Good luck!