My girlfriend touched me and then she used the bathroom 5 minutes later.no ejaculate, if anything it would have been precum at most.chances of pregnancy?

Pregnancy: If your girlfriend touched pre-ejactulate with her hands, unless she inserted her fingers in her vagina - there would not be vaginal transmission. If she pressed her genitalia against your genitalia and pre-ejaculate was present - the pre-ejaculate would need to find it's way either into or at the very edge of the vagina for a chance of pregnancy. Pre-ejaculate does contain sperm.

Unlikely: Never say never, but very unlikely.