Trouble shifting into gear

[Kat219]

I have a 2013 YARIS I bought last year with 65k miles on it. Currently it has 71k. I moved from Minnesota to Texas and the drive went fine but now I'm having trouble with it having a hard time shifting into gear. Going up hills seems like it would be faster if I pushed the car up! I have to push on the accelerator hard to get it to go into gear. Today I was using my cruise going 55 miles an hour going up a hill and it suddenly shifted into gear and accelerated.

I drive over 75 miles one way to work each day and I have to press on the accelerator so hard to keep it going 70 miles an hour that my leg is beginning to hurt to press the pedal. I know it's not a high performance car but I don't think it should be struggling to maintain 70-80 and even at 60 it's struggling.

I want to take it in to get looked at but I'm afraid to take it to the dealer and just tell them somethings wrong because I don't want to end up with a huge bill trying to figure out what is wrong.

Anyone have any idea what it could be? I just had the oil changed but it was doing it before that. Someone said it could be fuel injectors? Help! I don't want to make it worse by driving it if it would make it worse.