I made myself a watermelon-apple-forestfruit milkshake 2 hours ago and i've been vomiting for 1 hour. is there a connection? what can i do?

Contamination: Something you ate was contaminated, and you have been infected with a GI virus, most likely. The vomiting is the body's way of recognising an invader and getting rid of it. Try to drink sips of water if you can between vomiting episodes. If you feel dizzy, get bloody diarrhea or fevers, go see a doctor. Ginger or mint are thought to help quiet nausea (ginger tea for example). Good luck.