One of the problems with shrimp is that potentially may contain some mercury because they are bottom feeder fish. I would try to stay away from it as much as possible.
If you take probiotics, this may make the diarrhea worse or better. I would try to eat some solid foods, etc. to get the toxins out of the body.
The alcohol is definitely not a good thing for the diet and damages the liver, etc. You need to stay away from this as much as possible in the future.