Bruising from Blood Test

Hello all,

Had a blood test around 11 yesterday and experience some swelling around my upper arm. I woke up this morning and a bruise has started to form and over the past 8 hours it has turned bright red and it's about 2 and 1/2 in height and 1 and 1/2 inches wide. I have limited range of motion in my left arm and it's very sore and tender when I touch it.

I contacted the nurse who did the blood test and said this was common. I'm very worried as it looks like my bruise is still spreading. Has this happened to anyone?