Can't take care of one... Two on hold

Todd and I were really looking forward to attempting to get pregnant again in a few months but this weekend something happened that completely put that on hold. My medicine makes me very very tired and last Sunday the exhaustion put Lesley at risk. Todd and I usually switch of mornings on the weekend so that only one of us has to be up at the crack of dawn with Lesley. Sunday was my day and I was so tired. I convinced Lesley to watch the Elmo DVD and I fell asleep. When it was over she played Dora on the computer for a little while while I continued to snooze on the couch. Finally Lesley wanted a temporary tattoo. By now I was completely out of it... unable to even lift my head. So Lesley decided to do it herself. She got out the tattoos and the big person scissors and started cutting apart all of the tattoo. When Todd came downstairs (I am unsure why he finally came down) there was a pile of tattoos on the floor and Lesley was trying to wake me. Todd sent me back to bed and I slept till 11:50.
Later Todd told me that he was really frightened to see that I couldn't take care of Lesley. Those words hurt a lot but I know they are true. So instead of preparing for getting pregnant again that isn't going to happen now.
I was asked lately if my meds are helping me and I paused before answering. I have a hard time saying Yes to that question. I am 60 pounds heavier, unbelievably exhausted in the mornings, and depressed at how fat and ugly I have become. When I compare that to the "positives" of the meds I am unsure that meds are helping me. But the truth is Todd would leave me if I stopped taking them. So I don't really have any choice.