What Does Vomiting Up Of Foamy Substance Indicate?

Hello, im a 19 year old female, when I was 17 I had lost about 40 lbs and was diagnosed with GERDS, IBS, and a hiatal hernia.... My surgeon(sp) doesn t want to do surgery because im to young. My specialist says its all anxiety. Anyways everyday of my life I feel raw, just I feel so sick to my stomach at all times. Sometime I rather not eat because id rather deal with the hunger pains, than the pain when I finally decide to eat something, I have had several fainting spells/ seizures because the pain was so intense. I don t have have heart burn, rarely I do but it doesn t last long, I do however throw up a white foamy substance on a regular basis. its so hard to keep anything down. Why am I puking up the white foam substance, I read its GERDS but I also read it could be very serious. I have completely lost faith in the doctors and specialist I have ever gone to. So I guess where im getting at is: Is the foam im puking up and the pain have anything to do with the hernia (which I have been told it is on the larger side) and if so should I seek medical attention. (I also have several internal hemorrhoids, and for the last several weeks have been loosing a lot of blood.)