Will I have been on Yasmin for 3 months I only went back on it be...

Will I have been on Yasmin for 3 months I only went back on it because I had a baby. an that I was on it b4. But now being back on it it has made me feel like crap. I am a new mum so I need to b 100% at all times but I get up in the morning an feel like I have morning sickness all over again an bad headache an the smell of some food makes me sick. so I did a pregnancy test 4 times and all have come back negative. so I take the pill in the morning around the same time every day and it all start from there. so instead of having it in the morning I had it in the afternoon but b4 I had it I was all good then I took it an started feeling sick. so I don't know if this is the norm after having a bubs and how I'm to feel but I have stop it and gonna try another type of pill.