Bug bites on the BART

Bug bites on the BART I commute on the BART five days a week from the Pittsburgh Baypoint station and the last few days I have noticed bug bites on my back, the back of my legs, my stomach, and ankles. I've noticed that only after riding the BART I'm super itchy and I constantly have new bites after getting off? I've checked my bed there's nothing! Is there is anyone else getting this same thing happening to them? I spend a lot of money to ride the BART and Yesterday as I was sitting in my seat a flea jumped on my leg or at least I think it's a fully I don't know the difference and bugs! Has anyone else been having this happen lately?