I used to call it "spinning" I'd get thinking, then thinking about what I was thinking until I was suddenly in this unending mental spin chasing the details of absolutely nothing. The other thing was the trees were the wrong color green. I never could explain it to Jeanette. It wasn't like they were neon or something goofy, they were just wrong, lol.
I still have days, and they increased again with this LBD and cognitive problems, but I was so much better after the depression meds, and now that we have my LBD meds figured out my bad days are decreasing again.
If at all possible go see a Dr. there may be other options besides pills. Be open about your cannabis use. On that, I never sign or check anything saying I smoke. I tell all of my Dr's that I want to be open with them so we can make the best decisions, but anything I say is not to be reported/recorded for any outside people. If they're good with that, and everyone has been, some more than others, but they're usually very glad to have the correct info, I tell them what's up, if one wasn't I'd request a referral.
If you can bring yourself to it get a referral for a shrink. I recently started seeing one myself. At first I went only when I felt like I need to talk to her. During those visits I got to know her and relax a bit. She actually, privately of course, encourages my growing because she can see the benefits I get from it. She wishes it was something I couldn't go to jail for, but she gets the 2 prong benefit from growing and using.
I wish you the best brother. I know that hole, and it's not fucking pleasant in any way shape or form, but as hard as they are to see, there are many different ways to get out, or at least get some damn steady light down there.