Have any of you experienced supply dips due to illness, medication, or even af but been able to beef up supply after the fact and continue breastfeeding?

Ok, I had an ear infection last week and went to the nurse practitioner at the company I work for. She put me on a 5 day z-pack of antibiotics. I let her know that I am bfing and she looked up some stuff and said that this would be okay (I wish that I had put a posting up here asking all of you what you thought

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Huge supply drop. DS got his flu shot today so I asked that nurse. She said that she has heard more supply issues with this antibiotic than any other. I took the last one today and she said that it will stay in my system for 5 days. She said supply will stay low at least until then and then I will have to drive it up. At this point I knew supply was low b/c of how empty my breast felt, but, because of the weekend I had been bfing directly so I wasn't sure. (I pumped after every feeding yesterday to try to push supply up but only got 1.5 ounces). DS has not complained at feedings, but I know he isn't getting as much as normal.
Well, today I am back at work and have to pump. I normally pump twice a day and get at least 18 ounces (I need 16). Well, I have only been able to pump 6ounces today

and, while pumping is not a clear indicater of supply, how empty my breasts feel is. As long as I can get at least 8 ounces a day my stash will hold up for the 5 days and I can suppliment to get through the week.
My question is, is this an end to bfing

I am pretty upset and emotional about this. I am pumping more times per day than normal, I am pumping after every feeding, I started taking fenugreek last night, I am drinking a TON of water.