Oh Sunshine, I am so sorry hun that you are going through this. I would give the antibiotics a couple of weeks to work and then a couple more weeks to kick in. So a month total. Sinus infections can be very hard to get rid of and be reoccuring. If the midrin isn't helping I would call your dr or drs nurse and let them know. There are other types of meds that you can take besides midrin. It sounds like they must have suspected migraine as well since that is the only type of ha midrin is used for. And if that is the case there are other meds that may work such as imitrix, zomig, axert, frova, amerge, maxalt, migranol ask to try one of these. You have a right to be pain free the only way the dr will know you are still hurting is if you tell him. Good luck.