don't know what to do

background:  5+ years of interrupted sleep disorder (possibly apnea or narcolepsy/untreated thus far), lived unhealthy lifestyle until 2-3 years ago, have lived for past 3 years in cairo (stressful, polluted city)

3 weeks ago i smoked some hash that was polluted with some chemicals, it made my heart beat really hard, i was sick for two days

after i felt better i was out drinking a lot that week, smoking because i was stressed, and started to feel sick and noticed an occasional slight constricting heart pain.  

at the end of the week i was doing heavy lifting and overexerted myself,  i felt pain in my heart fell and down.  got in cab and went home, could barely walk from cab to flat door.  for past two weeks i'v ebeen recovering, i've gone from barely able to walk without experiencing pain my heart and feeling dizzy to doing much better with lots of rest.

i saw a doctor who ordered an ecg, but when it came back without any abnormal results he told me i was fine and not to worry, even though i've read online there are other tests the doctor should do if its possible i had a heart attack.  this was in cairo, since i've traveled back to los angeles (here for a month)  i was feeling much much better friday before travel - the program of rest i self prescribed seems to hav ebeen working - but the 40 hours of traveling with little sleep seems to have set me back and i don't feel that well since getting in, in fact i feel some slight pain in my chest right now, bu tdon't know what to do about that.  i generally feel weak and afraid to do anything that will get my heart rate up.

i don't have any health insurance in the states.  i do when i go back to cairo in a month but i'm really unhappy with the quality of care there.  i might try to go to a free clinic in los angeles but i don't even know how that works.  any advice at all would be appreciated.

[Cleveland Clinic]

The easiest way to approach this would be to actually go ahead and have an ECG while you are having this chest pain.  If it's normal than the likelihood of this being cardiac is very low.   However, I don't think that you chest pain is cardiac anyways, but because it seems like you have a tendency to try "stuff" I can't be absoultely certain because people that do that tend to developed coronary arter disease much faster.