I had an experience some 12 years ago that may be pertinent to this.
I had been away from church and God for years. I just come out of a psych ward for depression, anxiety, and PTSD. I had expressed a desire to end my life, never acted but the expression was enough to lock me away for 2 weeks. Anyways, I was at a gas station getting some milk, it was just me and the clerk in the store.
"Trust in the LORD with all your heart, lean not on your own understanding. In all your ways acknowledge him, and he will direct your paths."
So I start looking around, seeing no one, but hearing an audible voice. AUDIBLE VOICE right over my left shoulder. I shrug it off, I had just come out of a psych ward after all. Took one step...
"Trust in the LORD with all your heart... Bryan are you trusting me?"
"Lean not on your own understanding... all these years you thought you had the answers and look at where you've landed."
"In all that you do acknowledge me... and I will direct your paths. Bryan come back to me and I will set you free."
So I sighed heavily, thought about it for just a second and said:
"Yes Jesus, I'm sorry, please help me. I commit myself to you again."
And instantly, in the middle of this gas station I felt all this pain and pressure flee from me. It was amazing and I can not even express to anyone how amazing it was.
Now that story is pertinent because I hadn't been praying. My Bible when I got home had layers of dust on it. I wasn't seeking God for healing, I wasn't seeking God for anything. His name only left my lips in vanity and lawlessness. But he healed me anyways.
Now that doesn't preclude that someone else may have been praying for you! I pray all the time now for God to reach out to touch someone who is struggling in depression, or any number of issues. No idea if anything actually happens, but trusting him to fulfill his word. So it's possible that he just healed you out of his grace. But it's also possible that some stranger somewhere prayed a prayer in faith for an anonymous soul and you were the gracious recipient of it.
At any rate, HALLELUJAH! for his healing touch ya?!