Fuel or at question if line or other issue

This happened twice as i was entering the freeway, one thing to consider is that the incline to actually get to the entrance is a very very steep 1/2 block when you turn onto the road. Because the road that leads up to it the elevation changes quick.
Anyways i believed i may have ran or was running out of gas but my gause read just under 1/2 tank. And i havent traveled enough miles to empty it. The engine surged as i gently pressed on the pedal to increase my speed. It was 99° outside as well. I made it to a gas station filled up and it waited again to freak me put the same way when my gauge was 1/2 tank full.
Dang im confused what this car possibly want. Bad gas? Clogged fuel line? Battery has been replaced. Reminds me of a vapor lock engine.

Help help!!

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Btw 2008

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