Mystery Nausea Explained

At approx 5 weeks post op I began to experience daily bouts of extreme nausea in the mornings which would last all day. I thought it was something I was eating (I knew I wasn't pregnant as I'd recently had my period). After weeks of experimenting and feeling miserable, I learnt that my birth control pill (Apri) was the culprit! It must've been throwing my hormones out of whack. I've stopped taking it and am instantly cured. I'll have to find another method of contraception but did want to share the insight with others in case anyone is mysteriously unwell after surgery.