first of all congrats for being brave enough, and self aware enough to know you are struggling and to ask for help.
second, get in to see that therapist as soon as possible!
in the meantime
the anxiety and phobia workbook is supposed to be very helpful in giving strategies for dealing with this stuff.
what kind of symptoms do you have when you panic?
i've found that the best way to survive a panic attack is to do grounding and breathing exercises.
for breathing: my favorite breathing exercise involves picturing a calming beautiful color and then i picture myself breathing it in, i visualize the color entering my body and moving throughout my system and calming me down. this helps in two ways, one it gets me breathing normally again, and two it distracts me somewhat from the blind terror of the panic attack.
for grounding: i find it helpful to do things that are really tactile, they help keep me connected with reality so i don't get too overwhelmed by the panic attack. i knit, i draw, if someone is around who i trust i like to establish some physical contact and then have them tell me a story. a really nice exercise is nondominant hand drawing. don't worry about how it looks, just focus on the act of drawing. use whatever hand you don't use normally and use strokes and colors that represent how you feel. i usually start with short strong red strokes and then as the panic ebbs i find myself using longer smoother blue-green strokes.
remember: you can get through this. it is completely normal to have been thrown off kilter by the death of your mother, and you deserve to be kind to yourself.
oh one more thing to think about
: if you continue to find yourself unable to work to support yourself you may be able to get disability benefits, that will help you not be so dependent on your dad.
Can't get over death of my mom. HELP!!! 
