I am dignosed woth high blood pressure.

Hi My name is AKSHAY KSHATRIYA I am 29 years old, 2 years ago I was suffering from lots of problem s like unusual heartbeat, headache, trouble in breathing & my doctor told me that I had high blood pressure. After that I started his medication In that he gave me a pill which is called PROLOMET XL 25. about 4 to 5 months I took it and my BP was showing normal. So I stopped the medication. Now after that I haven't taken any madication & I am facing headache problem so I got Check my BP and it's showing 180/120 So what should I do? Because my previous doctor changed his clinic to another city & in my area there is no other doctor like him. So please help me Suggest me the medication so I can maintain my BP normal.