Frog, I'm so sorry you are going through this. I've been there.
I have had some awful trauma in my life and 'prided' myself on not taking ADs. However, when my STBXH left for OW, I was utterly broken, couldn't function and was a danger to myself.
I have a very understanding GP who never pushed ADs on me but on one visit he did say that if I didn't take them, then I was heading for the stage when he would have no option but to give me really strong ADs. I was in total depression and couldn't function.
I started taking Citalopram (20mg) and then up to 40mg. They really, really help but then I was in the pit of darkness - not being dramatic, those who have read my threads know how bad I was.
I wouldn't recommend ADs to anyone but that is purely because I don't know their situation but I know they have helped me get up in the morning and face all the horrible rubbish that goes with a divorce.
I reached a day when I didn't cry, when I didn't think of him every second and where I could move forward and be a happy person who people want to be around.
I was worried that I wouldn't 'feel' anything but I do, they just take the edge off and help you carry on.
It is your decision but if you have a supportive GP, they should monitor you closely.
I'm so sorry for you. It does get better, I never thought it would 