Am I anemic or just have low iron? What should I do?!

I'm 16 years old, and I'm female :). Last year, I was noticing that I constantly felt sick. Especially during my periods... I got intense cramps, my flow was so heavy it was uncontrollable and I felt dizzy, faint and felt like I was gonna puke every time I was on it. So, I went to the doctors and they did tests and told me that there was nothing wrong with me.

Now, I have the same symptoms but they're getting worse... especially now that I'm on my period. I had to stay home one day this week. In the morning, when I look at my face in the mirror its like a ghost. But then I take a shower and put on makeup and its less pale.

I'm honestly SO tired of feeling this way. I take iron every so often because apparently iron deficiency runs in the family. But, it doesn't really seem to help to be honest.

I think I have all the symptoms for anemia... even the cold hands and feet, CONSTANT fatigue, occasional depression etc. Should I see my doctor again. He was pretty useless last time.

What do you think I have?

PS, 2 weeks ago I changed my diet and stopped eating red meat. Because I don't like it and I feel bad for the animals. Could that have something to do with it?

Today in school I felt like I was going to pass out, its getting really bad and I need some advice!