constant nausea, occasional shortness of breath

The end of Dec. i got a wisdom tooth infection and was put on cephzil 250 mg twice a day for a week. Three weeks later in Jan. infection came back.Cephzil again for a week and a half.. percocet as needed. I'm 27 years old, 5'1 100lbs. Scheduled surgery Feb. 20th. I suffered severe pain afterwards due to past infections. I lost four days of sleep& took Keflex250 four times a day and perocet thirty tabs.7.5/500mg every four hrs. around the clock for seven dys. Ambien for five days to help me sleep.When I discontinued all meds. March 3 a wave of nausea hit me all night. The week of the 5th and 12th my stomach was not right but no vomit or diaherra. No bowel movements yet cause of painkillers. I simply ignored figured it was normal. My surgeon checked me out and said no more infection by x-ray. However, the week of the 26th constant nausea & sometimes shortness of breath. i'm so worried. I'm having normal bowel movements. My doc. said my blood results &lung x-ray r fine no infection. Did meds cause stomach damage? I hate feeling this way. My appitite is good. I thought maybe virus but obviously not the case.Gallbladder test since nausea is a symptom scheduled next week cause i've been getting indigestion yet I think prevacid caused it. took it for four days and discontinued. I'm more nauseas after i eat...for hours.. Scheduled for stomach doc soon... please help i know three months of infection took toll on my health. I take neurotin for nerve damage 2 yrs. i've never had a problem with it.