I will do everything I can to help.
Yes, it IS very possible
to get trichonomiasis in ways other than through sex. I think the non-sexual transmission of trich hasn't been studied enough by doctors because I hear this situation with trich far more than with any other STD (women who are diagnosed and know their partner hasn't cheated on them). Trich lives in moist environments so the biggest possibilities of non-sexual exposure lie there.
Trichomoniasis is a parasitic disease caused by a single-celled organism (specifically a protozoan parasite) called Trichomonas vaginalis. You can get it from wet towels or bathing suits (and probably other ways than just those).
In women, symptoms will usually develop within 4 to about 28 days but can take as long as months or years to develop
. Women, however, can be asymptomatic and therefore be unaware of infection
Men often do not have symptoms. If they occur, symptoms as well as infection can self-resolve, but this may take weeks.
Men are often asymptomatic and not easily tested for Trichomoniasis so it's important that a male whose sexual partner has been diagnosed be treated even if he has no symptoms. Sometimes the woman's doctor will just write a prescription for both partners. You might want to ask your MD if they can do this for you and your partner so you can get this taken care more quickly. It's important that both of you be treated before resuming sexual activities so you don't ping-pong it back and forth.
I hope this helps. Please don't make any rash decisions based on the trich diagnosis because it may be that your partner is completely innocent.