That's an option. Whenever I get bit by a mosquito or a wasp, I swell up where I was bitten. Try going to an allergist. Until you get an appointment, use Caladryl. It's a lotion i use for bug bites and it works wonders.
Your bug bites might be blistering because you are allergic to the bug that bit you. You can visit a doctor or a dermatologist to get the proper treatment for the allergic reaction that you are suffering from.