Rash

i dont know if this is the right forum to post but i will post it. I got some kind of rash circles on my leg 3 or 4 days ago,at the time,there were just 3 5 little rash kind bumps on the back of my left leg,it doesnt hurt,i dont feel the need to scratch it,nothing.I went to the doctor,and he said that its probably a mosqito bite,but im sure it isnt.i dont get bitten by mosqitoes often(maybe once or twice the whole summer),and on our way to the doctor i spotted two more rash little circles on the same leg.I got some kind of cream to put on twice a day,it started helping and i think if i continue using it,they will disappear. the only problem is,that rash circles are spreading,now i have like 5 6 on both legs. im sorry for my bad english,but i think you will understand what i mean.Does anyone know what are these little reddish rash circles? btw im 15 year old

here is a link to the picture