Strange Insect Bite

So about a month ago in Stuttgart I was repeatedly being bitten by bugs, apparently in my sleep. But the second day of this insect attack there was a distinct bug bite on my right foot. It had a small circle, and then an oval red shape around it. It really hurt when I put my shoe on, and a few days later my lymphnode around my left armpit swelled up and it hurt to move my arm above 90°. A few days later the lymphnode went back to normal, and then so did the bug bite, sort of. Well one day about a week after that (3 days before I left for Poland), I thought I got around 13 bug bites on my right foot all around that initial bite. I thought that was strange. Later that night I showed it to my buddies... It turned from 13 bumps to a rash type looking thing. And every day after that it kept growing and growing. Now the rash goes from my toes to the bottom of my ankle. I decided to get some medical attention (yes, despite being in Poland, I know). So the doctor gave me 2 types of antibiotics and some steriods to stop the itching. She said that if it doesn't get better in 4 days then I should reseek medical attention (I will be in Lithuania... even scarier than polish medicine). I just hope that this thing goes away.