Pain after a fall last week. not sure if it is some thing that will go away or if i should have it checked ou?

our 120 lbs dogs were wrestling around and one ran into the back of my leg i lost my balance and fell into a skid loader trailer. bruising my under arm quite good and i could not breath well for a few minutes. kind of hyper breathing trying to catch my breath. I felt the opposite side like when you crack you knuckles and well that is still sore but thr bruise is nearly gone but my under the area is still sore and radiates to my back. and i cant sit scrunched as it is uncomfortable. could it be anything or should i give it time