Should I go on a plant based diet?

I been eating more meat for the past few years than I have ever done in my life,
Meat for breakfast for lunch for dinner for snacks even!
I thought I would be healthier after all our brains evolved through eating meat,
But today when I went to the doctors office I found out that I have actually gained some weight and my energy is lower than ever,
I remember when I used to live at home i ate mostly plant based food and minimum meat but I was way energetic and healthier than now,
But what confuses me is that some doctors say avoid all meat and dairy while some say eat meat and organic dairy just avoid sugar and processed,
As if it's so cheap and easy to get organic food I never seen it anywhere and I live in the city center!
The only way is to just get a farm and grown my own food and raise some cattle and eat them cause the food industry cannot be trusted anymore,,
Or better yet I think I will just stop eating and wait for death through starvation!