As trichomoniasis is a sexually transmitted disease take an antibiotic course prescribed by your doctor. Along with this take a preventive measure such as use a latex condom during sex, have a monogamous partner who is not infected, keep the area clean and dry. It is better to abstain from sexual activity until you are completely cured.
A table spoon of Apple cider vinegar mixed with two cups of water can be used for douching. Eat a balanced diet, consume lot of yogurt which help good bacteria to thrive and fight against the infection.