trying so hard to get pregnant, I don't know what else to do!!!!

So me and my SO have been TTC for a while and it's like mother nature keeps playing peek-a-boo with me, July I had a somewhat normal period. it came for 3 days and i was off a day, we had sex that day and then he next day I was back on for 4 more days. August comes and i only have a 1 day period but I had sexdamn near all month with my SO and nothing still happened hear it is September I don't know if I'm spotting or having a regular period there is no clots and there's only blood when I wipe can someone help me out if you have been through something like this or know what I'm going through and can give me some type of help because I think I'm driving myself into a depression please help.