I HAD A LITTLE STING ON THE INSIDE OF MY

I HAD A LITTLE STING ON THE INSIDE OF MY ARM, WITHOUT LOOKING I RUBBED IT AND A FEW SECONDS AFTER I RUBBED IT AGAIN AND IT WAS SWOLLEN, A TINY RED BUMP APPREAD AND IT WAS BRUISED, I WAS SITTING IN THE WAITING ROOM WITH MY SON WAITING TO SEE A DOCTOR AND I WAS CONCERNED, SO I ASKED A NURSE AND SHE SAID IT LOOKED LIKE A HEMOTOBIN, TO PUT ICE ON IT AND IF IT WASN'T BETTER BY TOMORROW SEEK A DOCTOR, THE BUMP IS STILL THERE AND A BIGGER BRUISE AND STILL SWOLLEN......HAVE ANY IDEA WHAT AND IF I WAS BIT BY AN INSECT??