I do not have experience with fertility drugs but I do have experience with lack of/disrupted sleep and I would like to say that it has no inpact on my temp taking. Some others have said that your temp will be incorrect if you have a restless night and it is recommended that you have 4 hours of solid sleep before taking your temp then to do it immediately without moving/talking first. I personally can have a very rough night and then wake up and see my temp travelling nicely in a pattern, I can clearly see when I ovulate. I think that it is worth a try, do it for a month and see what happens, if it gives you some answers great, if not, then at least you know, right?

Best of luck xx