Pill and nausea

dream

I'm on the pill for one month. Currently having my period. My period was seven days late and I was suffering from severe nausea and it's still going on.I also suffer from asthma with high IgE. It's spring here, which is an allergic season itself. Does the nausea is caused by the withdrawal of pill? I also get a heavyness in the chest feel. Is it normal? Will it go away if I start taking it again?I've read about all sorts of side effects, so kinda scared.