What Could Be The Cause For Chest Pain And Swollen Hands And Feet?

I m 39 years old, white,5ft6in,108pounds, My meds are Buspar 60mgx1 Trazadone 150mgx1 Lovenox 90x1 Zanaflex 2mg3x1 Equip 25mgx2 Levothyroxine 200mcgx1 Suboxone 8mgx1 Vistril 60mgx1 I ve been having chest pain on the right side. It started 2 weeks ago. But 2 months ago my hands and feet started swelling mostly when I m getting up and then for a couple hours after and I ve been losing weight a lot. I went from 140 in April to 108 now in November 1st. Right after my swelling i started getting light headed where when i stood up all i saw was black with little spots then i would have to sit down right then and there cuz my legs would give out. Now its my chest hurting. I m going to be honest with you I m a heroin addict but been clean for 2 years. This passed April i smoked meth for the first time. It was April 20th when my husband went to prison,he s doing 4 years. Anyways i tried meth but just that one time on the 20th of April. I haven t did anything else since then. I m on suboxone for my addiction for 2 years its worked great. I m worried something is wrong with my heart. I ve been stressed but never had chest pains before. I know you can tell me for sure and you want me to go get checked by Dr in Person but can you give me a couple things that could be wrong with me so if i do go to the drs I will have an idea where they should start?