ovulating good does not necessarily mean pregnancy easy or at all, while bv is not a weighty concern for infertility, it does need to be addressed as the levels in the vagina when a imbalance is presence can cause the vagina to be too acidic and thus kill the sperm before it has chance to travel to fertilise the egg, also what makes u think ur bf has a low sperm count?
my advice keep trying for the bambino and if u hav no look after 12 months go see the doc, it does depend on ur age though, it can take upto 18 months for a healthy couple under 30 to concieve naturally, each month there is only a small window in which conception can happen in the window of the ovualation which is about 48hrs or so, try in this window for best results, take folic acid now if u not already.
good luck hun x