I've been feeling bad

I've been feeling bad, I don't like to say that because it makes things worse, I seem to be on a thin line.
I was 60 days without PMO, I started to feel bad, I had a nasal congestion, I get tired, I started to get irritated with little things, after such a time my strong and cheerful state decreased.
I ended up failing 3 times in 3 days, I felt a certain relief followed by a bad feeling, I could call it depression. it is as if something was predicting me even though I wanted to leave.
I've read a sentence that peace and happiness is within each one, you just have to decide how you're going to feel, I can hold on for a while, but bad energies.
At this very moment when I write this topic I want to feel energetic and vibrant, but I can't elevate it.
I don't know if it was the quarantine and I did absolutely nothing for about 3 months, just lying in my bed on my cell phone playing or on youtube. I started to lose the will to do that.
Has anyone ever been through this, does anyone have a tip to save me from this pain?