I had unprotected sex with my partner the 31st of December and around 5 am on the 1st of January I had severe diarrhea and vomited. I vomited once more around 12 pm and had diarrhea that day and the next day. I'm worried that I'm not protected and his sperm could still be inside and get me pregnant. Is this possible? I take my pill at 8 pm every day, I've never missed a day or pill for more than an hour and I never had diarrhea less than at least 4 hours after taking my pill.