Ttc month 6 help!

Hello beautiful people. My husband and I have been ttc for going into our 6th month. The last 3 months I've been using opks to track my exact day of ovulation but so far no luck in getting preggers. I finally decided this month I'd just enjoy life and see what happens. I was looking at one of my other period tracking apps and found my cycle is all over the place... I've posted a photo so you can see. I don't know if this is normal or not. But last 3 months with opks I've realized my luteal phase short. June and July it was 10 days and august it was only 8 days.. wondering if I should keep trying or go talk to my doctor..