Yeast infection?

So apparently yeast infections are very common during pregnancy and taking antibiotics can cause them... so i took amoxicillin for bacterial vaginosis and im 99% sure i have a yeast infection now.. I even got a monistat vaginal health test from the store and it says if the tip of the swab you insert changes colors, it is "abnormal" and the entire thing turned blue... so I need an effective way to treat them and also tips to prevent getting another one during my pregnancy... thanks in advance 😘