1995 Chrysler LHS Engine running terrible

I have a 1995 Chrysler LHS with 150,000 miles on it. While driving a few weeks ago (around 45-50 MPH) the car felt like it was loosing power for a few seconds, then it felt normal again. I came to a stop and had a hard time getting the car to go again. It felt like I had no power at all. I pulled over and shut it off and after a few minuets it ran fine. I replaced the air & fuel filter and PCV valve to be on the safe side and it ran great. The other day while traveling at the same speed, it lost power again. I pulled over and let it sit a minute, but this time it had a hard time restarting. Since then it runs rough, there is no power in the engine at all and it constantly sounds like it will stall.

Any suggestions?

Thanks