I Feel Like I Have Been Punched Or Kicked In

I feel like I have been punched or kicked in the middle of my chest. It started last night while I was asleep. Every time I rolled over to either side or my stomach, it hurts. If I take a deep breath, it hurts. I'm a 36 year old female who smokes but healthy and fit. Please help. I don't want to go to the hospital unless necessary. Thanks