It's worth educating yourself as to what prolonged use of alcohol 5/6 times a week does to the brain. The hangover is your brain's blood vessels swelling due to prolonged use of alcohol....simple.
You've made the first step by coming here.
The next step is easy....stop....whether you know how to is what you should be asking next. And there are plenty of people here who can show you what worked for them.
Paul