I started getting a ticking noise in my engine.

I started getting a ticking noise in my engine, Sounded like it was coming from the camshaft area. I let my oil level drop, got immediate oil change went from a loud grindy noise to a steady tick ( not overly bad) but still, I did not like it. People said sounded like Camshaft or lifter, etc. I was driving home(no check engine light on at all) Car went quiet, RPM's struggling to rise ( my car usually has no problem hitting 5-6 thousand rpms instantly and opening up, I couldnt get past 2000) Automatic V6 aftermarket cold air, throttle body spacer, chipped and dual exaust. So it was struggling for power, slowed down for a red light. Car stalled. Turned it over, started went again, stalled again almost instantly, wouldnt turn over(brand new battery, so I think thats not an option. Had power inside of car and everything as well). So im pretty curious what you guys think! Thanks for your time,
-Brian