What would you do.

I took a job recently and I start the beginning of August. I just put my two weeks in at my current job ( first time leaving this job in 3 years ok, it’s scary! )

I got a job opportunity by an ASM of a bank yesterday and she is going to try to get me in with her because they make $3 more an hour than the job I just got.

If I get this job, would it be professional to call the job that hired me a couple days ago and explain I got a better job offer I can’t let go?

One pays $12 and one pays $15 an hour plus mileage checks..

And I really need the $15 an hour that would be amazing.

Has anyone been in his situation??