23 year old, healthy female.. Last night began having extremely sharp pains in left side of chest, almost closer to the center of my chest. The pain came every time I tried to breathe it and was extremely sharp and painful and I could not catch my breath and felt very dizzy and light headed. Sat down and drank some water.. Tried to breathe in deeply again and the sharp pain was still there and continued every time I took a deep breath. During that time my chest felt extremely tight and almost like I could only breathe in half way and when I tried to take a deep breath I had to really pull in hard and that s when the pain came. I ve been tested for asthma and do not have it. Since those pains started last night the chest tightness and not being able to breathe in fully without the pain have not gone away.. And since I woke up this morning there has been a constant throbbing in that left chest almost center area and it has not gone away and when I touch that are where the throbbing is, it s very sensitive. Any ideas? Thank you.