Throwing up when high?

Hey everyone, I'm a new weed smoker, I have been high 4 times, once to THC vape liquid. The first two times it was perfectly good and normal, but the two most recent times, every time I have been high I have been sick, like, vomited - a lot. Now I'm not sure if it was because, well, the first time I experienced nausea from being high was when me and my mate went through 0.5g EACH within 3-5 minutes (I'm thinking I went too fast), whilst vaping nicotine e-liquid occasionally. I think the thing that made me sick was both of those factors. I powered through .5g and vaping nicotine, so maybe the substances mixing wasn't too good? Only thing is, my mate was fine, and he was doing the same thing. The most recent time, only about 5 days ago, we were vaping THC liquid. The effects took ages to kick in so I think I may have thought it didn't work so had tons of hits (which I did) whilst also using my separate nicotine vape occasionally. I'm thinking I should be careful with how much I consume, drink lots of water, don't vape, and take it slow. Anyone have answers to why I kept throwing up? It may just be a coincidence but I don't think so. I haven't been sick for 4 years until now, so I'm definitely doing something wrong. Any replies are greatly appreciated.

 

To be honest isn't weed with nicotine like smoking weed with tobacco?

 

Ok I'll try, if I just do straight weed and I still feel sick I'll try with tobacco like a mixed joint in small amounts and see how I do