I had a very bad bite 13 years ago. I saw a Doctor who told me that the bite, which had turned yellow was serious. He gave me a prescription for anti-biotics which were 1000 ml. I took one and the next day the bite was getting better, two three days and three tablets. It was fine. The consultation and prescription cost me £30.00.
The same tablets in the chemist where 11 TL. For a whole packet.
Once bites are infected, this can make you very ill. Best to forget all the creams and get medical help.
I know that Chemists are not suppose to sell antibiotics over the counter, but my advice would be go to the small Chemists opposite Migros in Fethiye. This is where all the Brits go. The owner trained as a Doctor and is excellent. Go and see him.