Hi guys, so one of my family members has gastro and I’m just looking for some advice. I’ve been taking my pill regularly as always but I’m scared of catching gastro because I know that if I caught it my birth control would be ineffective during it due to the symptoms. I’ve had sex with my boyfriend twice this week, so I’m wondering if I were to get gastro and my birth control was ineffective, would that mean that I would be at risk of pregnancy from the previous sex I had this week?

It depends on the week of the pill you are in and how many pills are missed due to severe diarrhea. For example, if you're on the combined pill and you've had 7 active pills prior to missing a couple due to diarrhea you'd still be protected as it would be like a break week. On the combined pill you can also miss one anywhere in the pack and stay protected.