29 weeks and feel HORRIBLE!!!!

So I am 2 days shy of 29 weeks and I feel the worst I ever have. This is my first pregnancy in the first and second trimester seem to go by just fine with no complications. For the past week I have felt utterly exhausted, dizzy, gagging in the morning when I brush my teeth, abdominal pain, and my feet are constantly swollen. My feet never go down and I keep them elevated all day long and have tried soaking them. The last time I saw my doctor she did say I had anemia and we increased my iron supplements at that time. Right now I take 125mg of iron daily, but it does not seem like anything is helping and it has been two weeks since the increase. My eyesight is completely shot, I cannot see at night and I have blurred vision... Everything seems to get so dark quickly. I do not really get headaches but did have one yesterday. Right now I have a dry cough and my nose is pretty stuffy but my nose has been stuffy my entire pregnancy. I am starting to freak out because I do not know what is wrong with me, is it PE???? I have not gained hardly any weight, 4 pounds max this entire pregnancy and the doctor says the baby is growing perfectly fine at the rate she should be her heartbeat is great and she seems perfectly fine. Is this what I have to look forward to until I give birth? Or is it possible something is seriously wrong with me????