Raceka, it sounds like your T gave you reassurance in your session that he would not abandon you. "He said no I'm not going anywhere. He said when the time comes I will reduce your sessions slowly. It's not going to stop suddenly." This to me sounds very reassuring. Yes, of course, at some point in the future, you will not see him anymore, just as is the case for most everyone in therapy. But he said that time is not now, and when the time comes, it will be gradual.
"He said no I'm not going anywhere." Read the text in bold to remind you of your T's reassurance and that he is not abandoning you!
It sounds like you and your T are working well together. Please ask for further reassurance on the abandonment issue next session if you need it. Could it be that it is not abandonment by your T but another issue that has you so upset? You certainly have a lot of challenges in life. You have a lot of strength to be able to deal with your son and his addiction. My heart goes out to you.

Maybe writing in the journal would help you understand your tears and depression.
I think you shouldn't go cold turkey off of your meds at this time. Talk to your doc or pdoc about whether it is time to start going off of your meds. If it is, they can help devise a plan to help you taper off the meds safely and gradually.
hang in there.
sunny