So sorry that you are having some issues with throwing up this regularly. Have you been able to tell if anything you eat seems to set it off? I'd really advise going in to be seen by a doctor, you would be pretty amazed at how they will work with you if you don't have insurance. We've gone for care without it- and they set up payment plans and reduce the cost by huge amounts just to help.
I'd also try to keep a log of what you are eating and the days that you experience the vomiting- you can use an app like the My Diet Diary app to note your foods and place in the notes section any information about when you throw up- there may be a connection between the foods you eat and the episodes. Here's a link to all the mobile apps (if you have a cell phone), look for the My Diet Diary one.
http://www.medhelp.org/health_tools#/mobile_apps
Keep us updated on how you are!