Don't use soap down there when cleaning, PH will balance itself! Use monistat 7 to get rid of the yeast infection (safe during pregnancy) and try to add yogurt and/or probiotics to your daily diet!
As long as there's no smell you should be fine....you could try vagisil to make sure everything is 100% clean down there. There's also no shame on just looking up things online
Well Has This Started With Your Pregnancy.. I'm not Going to Say Its Normal Because Its Constantly But I do Know That It Could Be whatever Kind Of Soap U Are Using.! U SHOULD Just Keep Up Some Cream for It