Trying to conceive and......????????

my boyfriend and I have been trying to conceive since April and we are unsuccessful. We've been having sex three days in a row. We have sex three days before ovulation, ovulation day, and three days after but ever since April we haven't been able to conceive. What is going wrong with us or is it something to do with low sperm count or not ovulating at the right time and turning out not being able to get pregnant. Please help. We are about to give up trying if it doesn't work this month or in July.