Muscle aches??

I am still on the liquid diet thing and really I am doing great! However, last night when I went to bed my legs ached so bad it took me 2 1/2 hours to fall asleep. Did anyone else have that? Also, I am tired ALL the time. Is this normal? I thought I wouldn't be tired since I am taking vitamins and getting in all my protein. But I am tired all the time. Thanks in advance for you feed back! Hugs, Di