Thank you for your query at DoctorSpring.com
I understand your concern.
It seems like you developed acute gastritis, secondary to alcohol intake. In some cases constant retching can also cause slight esophageal tears. That can also lead to bleeding. Since it has come down, there is no cause of concern as of now. I will advise you the following medicines :
1) Cap. Omeprazole 20 mg once daily in the morning, before breakfast for 5 days.
2) Syp. Sucralfate 2 teaspoons thrice daily after food. For 5 days.
3) Tab. Ondansteron SOS to control vomiting. ( can be taken after each meal )
If you develop further retching, vomiting, or blood in stool, or develop fever, please get back to me immediately. An endoscopy may be required in that scenario. However start taking the medicines as soon as possible, and it is expected to resolve in 2 days. Drink plenty of fluids.