hey ladies, help?!

So to start I got my bc out on Aug 2nd I had a little spotting for about 3 days from the 8th-10th of Aug and I mean a little. so I'm not even sure when I ovulate because I never had a period on bc. so we aren't sure when to really "try" to get pregnant. not really sure where to start... do we just have fun the first few months or so I go but ovulation tests? I still haven't had a period or any other bleeding since Aug 8th. I took a test today and it was neg. any advice would help!! ty!