2006 Ford Mustang Started Getting Ticking Noise Engine Sounded Coming Camshaft

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