Purchased pentair whisperflo pool pump, thinking it was going to be 110v, but I mitakenly ordered 115v. I let it run once, and it go too hot and turned off, then I realized what I did. Anything we can do at our 100v box to run another wire, breaker, etc to correct the problem.

There is no difference between 110v and 115v. In fact, the nominal voltage in North America is 120/240v.

You did something else wrong to cause it overheat. Was it possibly wired for 240v by mistake?

In the US, the standard voltage is 120VAC so 110 or 115 won't make much difference. Look at the motor label and tell us what the rating says.