Not common for someone who finished treatments two years ago. Your blood counts should all be at normal levels right now and you ahould not be getting sick more often then the next person. You should make an appointment to see your doctor.
I don't get chemo, yet I suffer from terrible nausea! Most of the time my nausea meds don't work. I sip coke and munch on pretzels. Sometimes the little thing work. If you still have cancer, it could be just that. The chemo may not have anything to do with it.