Mosquito bites?

I have these disgusting mosquito bites on my legs. I also have two near my left elbow.
I got these bites at the horse track last week and now they’re all infected-looking and oozing yellow puss.
I’m beginning to think they’re not mosquito bites at all.
Some have caved in on themselves leaving a deep crimson crater in my calf. One scabbed over something awful. And one down by my ankle has bubbled up and over into like what I imagine a whitehead looks like magnified a million times.
“Don’t scratch them,” everyone tells me.
I’m not scratching them! I swear! I don’t know what is going on!
I fear I have some terrible disease.