Question.. Please answer

There is a very long story behind what I'm going through but I had a question. My ankle's been broken and last month me and my bf had sex and tried to get pregnant last month. I was prescribed some short term hydrocodone 5mg tabs. I took two yesterday and was fine but today I took two and am feeling super super nauseous and even took them with food.. and have no clue why. Period is due 6/12. Anyone think this is normal or is something else going on?