Suggest Treatment For Stomach Pain And Headache

I am a 30 year old female. About six months ago I started noticing a change in the amount of alcohol I was able to drink. Anything beyond two drinks and I was very sick the next day. Horrible headache and terrible stomach problems/nausea (constantly using the bathroom) that lasted a good 24 hours. About a month ago I noticed that even one drink makes me sick the next day. It doesn't matter what it is - wine or a mixed drink. It has never taken very much alcohol for me to feel the effect but it has never made me sick like this before. I am in good health, I workout regularly and I eat healthy. I am underweight but have been for awhile. Do you have any idea what could be wrong and how I could go about fixing it? Thank you.