Losing speech skills/brain fog/cognitive decline

This topic has been talked about a bit on this forum, but I want to bring it up again: I went through 13 months of mania, and after that mania I've experienced brain fog and depression, and with those two things has come a harder time to make conversation with people. I feel like I've lost all of my social skills, basically, and I'm scared.

What scares me the most is that I'm 30 years old and I don't want to live like this forever. It's not sustainable.

Has anyone else here experienced this? It would be nice to know that I'm not the only one.