Will taking an SSRI decrease my ability to reprocess?

Hi everyone,

I'm currently in the middle of reprocessing a lot of trauma (12 sessions of EMDR), but I'm really struggling in my personal life in between sessions to the point that my fear of abandonment is making me depressed and extremely anxious. Most of my close friends and family have suggested I take an SSRI to help me get through the process, but I am so scared that making progress will be even harder than it is at the moment, and I am struggling so much I just want EMDR to do be done as quickly as possible.

Does anyone know if taking an SSRI will decrease my ability to process things?

Ps: yes I'm going to be talking to both my GP and therapist about this, but just wanted to hear other opinions