5 months and still not pregnant :(

Renee

me and my boyfriend have been trying to conceive. i was following my ovulation on another site but found this one yesterday. i have all periods logged back from December till now. this month my fertile window started on may 27th ends on may 3rd. we have had sex three to four times a day everyday in this fertile window. i have a 4 year old daughter. any suggestions to help us start our family.