Did they ever piggy-back Abilify on your anti-depressant (not Lithium)? Only your Dr. and you can possibly know what is best for you to be taking, and your number one priority needs to be your own health. There are a number of drugs that are bfing compatible, as PP stated; does your Dr. know that bfing is a priority for you?
It's a hard balance to strike. You need to take care of you so that you can be there for your LO, but I also understand the instinctual pressure you feel to be nursing your baby. There are ways to make both things happen, if that is what you feel is in your best interest. But at the end of the day, you deserve to feel better. There is no need to suffer because there are a lot of options for SSRIs out there that may work for you and allow you to continue providing breastmilk, but if not then your health is number one.
One step at a time: some sleep and a healthy meal full of energy and nutrients will go a long way to getting you fortified so that you can make confident decisions regarding your medications.