Hi K.,
Most all kids go through a phase when they only want their mommies. It sounds like your daughter is in it :o) It's normal for you to be the center of her life, and yes, it is emotionally exhausting as you are experiencing.
When I moved my business into our home to prepare for the birth of our second son, I had the same trouble that you are having now. The kids think because you are at home, that you are there for them and nobody else. I remember thinking that moving the business in my home wasn't the right choice because I couldn't get anything done.
First, I adjusted my 'attitude' and reminded myself that my kids come first :o) It's amazing how frustrated I got, and angry toward them before I did this :o)
After I adjusted my own attitude, I began to "practice" with my kids.........I would say "Mommy has to work for a little bit, which movie do you want to watch?" Then I would go in my office and work. Of course they would interrupt, so after they interrupted, I reminded them, "Mommy is working and needs to concentrate, I will let you know when you can talk to me, please go watch your movie"........It took many times to get this down, which is why I "practiced" before anyone clients' came over. The interruptions get less and less, I promise.
If your mom is over to help you, then you can be reassured that your daughter will be safe and taken care of. What does she like to do? Maybe she can associate your mom with something she likes to do......like going to the park. Maybe when your mom comes over to help, she can take her to the park (or her fun thing)....It cannot be done each and every time, but it can be done often enough to help the transition.
Your daughter is still young, but she will learn and understand that you are "working"......it will just take time.
If she cannot adjust, then your daughter may have to go to your mom's house instead, so you can work. It might be the only way for awhile.
Good luck, K..
~N.