I (f/37) masturbated with the shower head and only afterwards realised water had gone inside me -_- Do I need to be concerned?

Ugh, such an awkward question.

New to masturbating in the shower - got a little carried away(!)

I was able to expel most of the water, but I'm now concerned about an infection if any water remains.

The shower had been running for some time before using it on myself, so I'm pretty sure the water itself won't have had bacteria from standing.