I've got allergies!

I went to the vet on Friday November 19 and found out I have about 20 or 30 different allergies. Wait... Let's recap. On the Thursday before, mom started noticing bumps on my back, they started out small and kept getting bigger and they were everywhere! She called the vet and found out that they were hives. She gave me a benedryl, the hives went down and we went to bed. The next morning they were back and I got another benedryl and later on got to go to the vet. Now we know they are definetly hives and my whole body was red and inflamed. The vet said most animals that come in like this have about 20 or 30 different allergies. Oh great now I have all these allergies to watch out for! I got a shot and antibiotics I have to take twice a day until they are gone (about 2 weeks). We got home and I have hives agian - I was allergic to the shot the vet gave me! I got yet another benedryl. Now today being Saturday, my skin color is back to normal (thanks to that shot) and I havent taken a benedryl since last night and still no hives. So far it looks like I'm getting better. We are all hoping that this isnt a life long allergy! Those anitbiotics would cost about $180 per month and I would have to take them twice a day for the rest of my life!