Chest pain after workout?

My chest is hurting after an intense workout and I don't know what it could be. To be honest I've been smoking weed for like 2 months now. I don't need people telling me it's bad or whatever but I feel like it is valuable information to know to answer this question right. I've been working out hard for the last three days and haven't done much working out for several months now. Today is the first day I've been feeling the pain. It isn't a sharp pain but I feel like I have shortness of breath. I worked out 4 hours ago and it's been hurting for 2 hours now. Im in a different country so going to the hospital is not on my to do list. I could get medicine from a store. I think it could be heartburn but I'm not sure. I'm begging to worry because it is bothering me. It's not very painfull but mostly uncomfortable