If it helps mate, when I had my recent travails and got to the point of feeling like I was cracking up, I had a pretty frank discussion with my GP where the possibility of antidepressants was floated. My feeling was that I was reluctant, simply because I knew there were very clear reasons why I was feeling the way I did, as opposed to a sort of ... vaguer sense of not feeling good, or indeed an actual chemical imbalance.
I felt what I needed was sleep (I had chronic insomnia), so he prescribed me 7 days pf sleeping pills, which helped break the cycle. I'm not back to my usual sound and restful 8hrs, more like 5 or 6 and a bit broken, but nevertheless, not seeing 4 and 5am on the regular has had a transformative effect. I'm miles off being happy or even content, but I'm not in the fucking pit I was 2 or 3 weeks ago.
Go with your gut feeling on it, it's your body and mind after all. And the lifestyle methods you mention certainly can't hurt either way, so defo give them a go.
Just remember (as I'm sure I've said before) – you are not making a meal of this. Keep talking here, and accept that the road to recovery will be incremental - there's no magic bullet - but things will get better, precisely because you've acknowledged your feelings, and are working proactively to do something about them. Keep on keeping on, bro.