If i took my birth control pill and had diarrhea 40 minutes later, do i need to take another pill? if i had unprotected sex 2 days before this stool incident, am i likely to get pregnant? i take my pill same time everyday?

"Diarrhea" occurring "40 minutes" after taking your active oral bcp will not diminish the effect of oral birth control. Think of the week at the end of the "active pills" where no hormones are taken for seven days, and pregnancy is protected over 95% of the time, so even if the diarrhea reduced the effect of the pill mentioned, pregnancy is very unlikely.

No, your medication will be absorbed properly, and you do Not need to change what you are doing. Your birth control should still be effective . Drink plenty of liquids until the diarrhea has resolved. good luck.