I was out drinking last night at a bar and then came home and snorted about 4 lines of heroin. I am new to heroin, just started this week. The lines were not all at once. Anyway, I was unable to really walk, dizzy, tingling and numbness in feet, nauseated if I got up off the sofa and almost threw up, etc. I know mixing alcohol with heroin is not a good idea, but since I had done so little of both...Then I passed out cold and have slept almost the entire day. Was this an overdose???