What would make my rpm surge?

I need help!!!

My 2014 Nissan Altima has been acting crazy.

While driving on the interstate at 70mph my rmps would go up a little. I noticed it but passengers didn't. Last night it started acting like it wasnt get power or a surge. You could press the gass and the rmps would go up but the car wasnt going up. Ive had transmission problems before with other cars and honestly this doesnt feel like a transmission.

It honestly acts like I have trash in the fuel lines. But I know that isnt it. The problem has gotten worse and I dont know what to do!!!

We have changed the spark plug, air filter, checked all fuel lines, and still having the problem. No leaks!!

What can this be??