its gonna be ok.
you and your T have to make sure you stay within the window of tolerance. (where i come from its actually called "learning-window" because it is where the brain is able to process things instead of just going into overwhelm)
EMDR has been hard but not as hard as other techniques we have heard about and for us it has been really effective.
if you have any questions feel free to ask. us and your T

one side note... a session a month is probably not enough when you do trauma work.
it really makes sense to see the T shortly after the trauma session to see how you are doing and help with stabilization.
trauma work needs a base of trust and connection. especially our littles find it easier to keep that when seeing the T more often.