Anti-depressants

Sara
I have a couple of questions about this before I talk to my psychologist about it. I have situational depression according to my doctor. My 6 year relationship ended two months ago and as you can imagine it has been very tough. My main struggle is my thoughts, they over power me. Is he sleeping with someone, what is he doing, does he regret it, replaying our entire relationship in my head, when he moves on, I'll be alone forever, I'll never feel happy again, he's going to have the best life now that I'm gone. Just stuff like that, thoughts I can't control. Will anti depressants actually help with these thoughts and control them? I'm very confused on how it will help me. Obviously I will talk to my doctor more in depth but j don't see her until Thursday so I wanted some insight before then. Thanks!