I'm taking prednisolone, vigamox, and nevanac eye drops following cataract surgery 4 days ago. Next day came down with terrible cold, coughing, sneezing, terrible sinus pains in face and head. Should I continue taking the drops? Isn't my immune system weakend by these medications? Also, can I take Tylenol #3 for pain? Also, am taking prednisolone every two hours. Isn't that much? Also, have trouble applying drops. Sometimes I feel too much is dispensed, sometimes not enough. Also, many floaters come and go, especially one big one that seems to hang by a thread above my forehead.