Weight and anemia symptoms?

Hi,
I'm a 21-year-old female and I recently began feeling very tired and weak. My symptoms escalated quickly, and I ended up in the emergency room because I was lightheaded, had no appetite, experienced breathlessness and palpitations with only a little exertion, and experienced major fatigue, some slight joint pain, and anxiety attacks. At the emergency room, they did an EKG (which was fine) and took a urine sample, and they said they could find nothing seriously wrong. I then went to my primary care doctor, who diagnosed with me a "very mild anemia." (I have not yet been given a prescription.) Since my doctor's visit, I have continued to be extremely tired with even slight exertion (especially in the hot weather) and I have had some mild chest pains and sleeping problems. I eat regularly, but my appetite is not fantastic, and I'm missing work because of all these symptoms.
I know that these symptoms are characteristic of anemia, but my doctor did say that it was "very mild." I have always had a very low body weight, and I currently weigh only 90 pounds (not as a result of any medical condition, but simply because of genetics). Could it be possible that my low body weight is making me especially sensitive and causing a mild case of anemia to feel much worse?
Thank you!

Hi, I'm also anemic and I'd have a lot of the same problems you have. Always tired, hard to gain weight and I always look thin and pale. I definitely think that having a low body weight makes things much worse. If you don't eat enough, the body starts to use your muscles for energy and that could be dangerous.

The other reason you could feeling tired is that maybe you caught a virus and you're body is telling you its not hungry because of it. Hang in there, rest up. Good luck