For about a week now I have been so tired! Making it through work is difficult and I sometimes nod off at my desk. When I am home I have to take a nap. Usually 30 minutes to an hour. Today though it turned into a 3.5 hour nap! Is this normal? When I was 8 weeks pregnant my hemoglobin was on the higher end of normal so I wasn't anywhere near anemic. I don't know what is going on but it's getting hard to function day to day because I am so tired.