Strange question. But very concerned

Hello and welcome to EmpowHer,
You cannot become pregnant from this for several reasons.

In order to explain why, you need to understand the conception process.
Sperm are very delicate, and conditions must be perfect in order for them to swim past the cervix undamaged and fertilize an egg. If the sperm does not make it past the cervix, the vagina quickly eliminates the sperm and conception will not occur. Also the female only produces one egg each month during ovulation. That means there is only a few day window each month when there is an egg for the sperm to fertilize.

Sperm is damaged easily and also dies in a few minutes in open air. The bottom line is, that sperm cannot survive the journey to the stomach, much less make it alive out of the body through urine.
The only way pregnancy can occur is if you have unprotected intercourse during ovulation where the male ejaculates into the vagina during penetration.

I hope that is helpful.
Faith