Hey, I have a daughter-in-law named Hannah
So, you're a parent--welcome to one of the hardest jobs in the world. I know kids can seem especially trying when crying is their only method of communication, you often wonder how the heck you're supposed to know what they want. It gets better, even before they learn to talk; you'll learn to get better at picking up on what she needs.
In the meantime, if you're pursuing things with your doc, then you're on a good course to being the better mom you want to be; don't lose sight of that.
I know it's hard waiting on one med to get out of your system so you can start a new one. Some meds can take time to build up to full effectiveness, too, so you may have to just be patient on that score once you do start the new one. Probably not what you wanted to hear, I'm sure.
I will say this though, as a parent and a grandparent. You recognize that there's a problem, you're seeing a doctor for it, and when you get that angry you take it away from your daughter and into another room. That IS being a good mom.
Be patient with the meds, and keep your doc up to date on how everything is going. I'd suggest maybe looking into therapy as well, meds can't do it alone.
Hope things go well for you.