sharp Pain on left hand side

i am 28 years old, and i have been getting sharp pain on my left hand side, i have been to my doctor many times, even went to get my ECG done, once and all of them was ok.
i still wonder why i get this sharp pain, and dizziness, i am kinda confused, do not know what to do?
what do you think is the problem? there is no heart desease history on my family. even when i i can't sleep on my left hand side, i get so much pain if i do so. please help me. i need help. really.

[Cleveland Clinic]

Your chest pain is likely not related to the heart.  It most likely is caused by chest wall muscle or bone or ligament pain based on your description.  This isn't a serious condition, but probably provokes some anxiety leading to the rest of the symptoms.  I think that you need some reassurance, try some pain pills and consider physical therapy.

[annajade]

A related discussion, chest pain was started.