Preventing becoming anemic/ anemia

So I’ve been bleeding for 45 days now and yes I have been to the doctors, gynecologist and hospital and they really can’t do anything until my next depo shot to stop the bleeding. Anyway I went to the hospital yesterday at 12am and they did blood test and urine test. Everything came back normal and they checked if I was anemic and they said no but that I need to watch it because I could since the lost of blood. I have iron pills and will start taking them but what else can I do to prevent it. I’m starting to get some of the symptoms but I don’t think it is because I just got blood work done. Any thing I can eat or something