Can My Chest Pain Be Caused By The Wrong Medication

Can my chest pain be caused by the wrong medication from my widow maker bypass 8 months ago , im om blood thinners and Toprol and i have a medicated stent , ive, read about all the side effects of toprol and have all of them i also taake 10mg of valuim 4 times a day and 10-325 percocets 5 times a day i almost feel as i did just before i found out i had to have the bypass surgery, i dont smoke or drink just not getting enough excerise???? ready to go back to hospital if i cant feel better soon, really frustrating! at 50
Vic