Hi Jacki, welcome to TE!
One year ago I was in your shoes and it was not fun! I had been anemic for some time and did not realize it until I almost passed out riding my bike - trying to climb a hill that was usually very easy for me. I began my recovery (following surgery to eliminate the cause of the bleeding & subsequent anemia) at the end of April and it was the end of September before my iron was back up within normal limits. I rode my bike throughout - in fact, was back on the bike 7 days post-surgery (there is a thread buried somewhere here about it). However, I was very weak & had no endurance until sometime in the fall. I am afraid it is a long, slow process but it will come back eventually!
"When I'm on my bike I forget about things like age. I just have fun." Kathy Sessler
2006 Independent Fabrication Custom Ti Crown Jewel (Road, though she has been known to go just about anywhere)/Specialized Jett