Hopeless and lonely

I’ve recently been going through a breakup (it happened the end of January it’s still fresh) and I have been absolutely devastated by that, I still love him and I think about him every minute of the day, and about a week later I find out that my best friend is moving across the country (i don’t get to see her again for a long time), and then a week after that I find out I may have something wrong with my heart, I am so beside myself I feel like I have nothing anymore, I lost 2 of my favorite people in such a short amount of time and I feel hopeless, the thing that sucks the most is I was doing SO good, I was happier than ever these past few months, I couldn’t even remember crying or feeling sad during the time, and now I can hardly go an hour without crying or feeling sick to my stomach, I haven’t been eating and I’ve been drinking almost every weekend and smoking weed almost everyday, I don’t know what to do anymore, does anyone have any advice or kind words ?