Yes your conversion was not right, you did too much for your tolerance, hence the vomiting. The nausea is the first sign of a mild overdose. The repeated vomiting was your body reacting to trying to get the opiate out of your system but it was too later it had been absorbed into your bloodstream and there is no way of getting that out via vomiting. I very much had the same reaction one time when I use to shoot heroin. I dosed up my first shot and didnt get the immediately effects i wanted so i cooked up a second shot...this was a mistake because for the next 4-5 hours i was vomiting/dry heaving every 20 minutes. Too Much Too Fast. nomad bloodbath