Question about vegetarians and possibly hypoglycemia?

I decided to become a vegetarian because of my love of animals and anger at the way that the animals are killed whom we eat. I gave up sodas two years ago and have not had a carbonated drink of any kind since. Around the same time I decided to become a vegetarian and I gave up beef, my thought process was simple. Since I've grown up eating meat, I will slowly remove meats out of diet, that way my body can get used to not having the protein from that source. It was tough but I am on my second free of beef year. In Feb I gave up pork and have not had any since. The problem is that lately, since last september, I have been having more issues with my system. You see when I was younger I used to get sick if I missed meals or went to long without eating. I would get nauseous, dizzy/faint (though I've never fainted), weak, incoherent, etc. Lately I've been having more and more occurences of such. Is it because of my becoming a vegetarian over time or is it possibly hypoglycemia?