I experience acid reflux with black stools and blood in vomit. What will be the cause?

Hi doctor,

I am an 18-year-old female with a height of 5.3 feet and a weight of 170 lbs. Sudden onset makes me feel tired and unmotivated. Since I have an ovarian cyst, I took Drospirenone and Ethinyl Estradiol tablets (birth control). I recently stopped taking Abilify 10 mg and Prozac 20 mg. I also occasionally take Hydroxycut women. I also smoke marijuana and e-cigarettes. About a year or two ago, I developed bulimia. At first, it did not affect me, but a year in and I started to go through spells of throwing up patches of blood. It usually occurs when I throw up for the first time in a while, not a lot of blood. I am assuming that it is the Mallory-Weiss tear, but I have never been checked out, so I have not been diagnosed with anything. Last week I started experiencing acid reflux and a lot of bowel movements. I threw up, with blood, and my throat has not healed since. I have black diarrhea, and I am having trouble sleeping at night. I feel nauseous, and food is not helping. If I throw up without food in me, it is usually throw up white bubbly mucus. Otherwise, I cough up brown mucus. My stomach is now just in pain, and I do not know if this is serious enough to go to the emergency room. Another concern is that I am a college student, so I do not have the money for expensive doctor visits. Thank you for reading through this tragedy.