96 T/A

I have a 99 TA, I was driving it home yesterday and heard a weird sound coming from the engine. I stopped and pulled over and noticed that it sounded like a rod was knocking. I turned the car off and back on and notice that it said I had low oil. Checked the oil and it was low. Added oil to the car and drove it back home. When I go really slow and stop the rpms will go up and down from 400 to 800. Can someone tell me if this sounds like a rod knocking and how to fix it.

Thanks