I'm 18 And Overweight. Last Night I Was Up Until

I'm 18 and overweight. Last night I was up until 4am because I think I was having a panic attack. My chest and upper left arm hurt a little bit. The arm hurt longer but it didn't hurt a lot it was just a little uncomfortable. My chest only hurt twice and it was split second pains, mostly when I turned a certain way. I was shaking/trembling and I was a little dizzy/lightheaded but it was also late at night so that was probably why. I was really worried I was going to have a heart attack and was just really anxious in general. I tried to sleep 3 times but was afraid. Once I was getting comfortable and nodding off (the 2nd to last time I tried) i got a sudden rush of energy and my heart was beating a little faster again.