93 Toyota Camry Transmission

How do you know if your transmission is going or if you just need to replace the fuel filter. I just started noticing problems on the 14th.

The car run normal and then will slow down and then speed back up. It seems as though it is not getting fuel, but then sometimes when it's in park and then you put in Drive it jerks, but not all the time.

Going up a hill I lose speed at times and then it catches. Any suggestions?