my husband and I have been trying to conceive since June. we have been tracking ovulation with an…

my husband and I have been trying to conceive since June. we have been tracking ovulation with an app along with ovulation test from the drug store, basal body temperature and nothing. my periods sometimes happen twice a month. but no matter if I have 2 periods in one month sometimes, my periods are never late and I know my average cycle is 25 days. We are getting discouraged. advice?