Like it or not, you have to start taking maintenance medicine every day.
Otherwise, you'd be like a pressure valve always waiting for the moment to pop!
Consult your family doctor (or ask for a referral from him) and allow yourself to go though a series of medical tests.
Of course, fatty and salty foods should be decreased in your diet. Try keeping the amount of intake to almost nothing.
Eat more vegetables and watery fruits.
Do light exercises regularly. Sleep well.
Avoid stressful activities like crash diet.
Go easy with any alcoholic drinks. No smoking!