Actually when I first taken it, I felt nauseous too. In fact before I tried blackmores, I was on gnc’s. I also felt nauseous. So when I went back to buy blackmores the second time, I told the sales person I felt nauseous and I actually also tested but BFN and it also makes my cycle lasted longer so the salesperson told me to take in the morning after meal and so I did, and I no longer have the nauseous feeling. I used to take the pills after lunch.I bought this supplement too but felt nauseous after taking it so i stopped or it will give me false hope as if i am pregnant... lol but i did read reviews that it made the cycle weird, so u r not alone!! The reviews are so mixed. Some ppl got pregnant within 1-2 months... anw i just bot Fairhaven fertileCM supplement on iherb, waiting for delivery so if it works will update!