Constant nausea 2 months. I had a baby 3 months ago? Is this normal? I've had major heartburn too and a sinus infection, could this be the cause?

Post partum nausea. may be normal up to 8 weeks after pregnancy. New onset heartburn could certainly predispose you to nausea, have you tried over the counter heartburn medications? Finally, sotalol commonly causes nausea but I am assuming this is not a new medicine for you.