I also bed share with my little one and never get solid sleep. I also would have been WAY too obsessive about temping/my chart/etc. OPK's worked brilliantly for me. I'm BFing my 20 M/O and it doesn't affect OPK's at all. I get mine from Dollar Tree and got an obvious positive every time I O'd!! They helped me know when I was O'ing and also how long (or in my case, short) my LP was and I was able to know when to start NPC based on when the OPK's went negative.
I got my BFP Saturday morning at 10 DPO!!!

I def think you should try OPK's. I bet if you can get the timing right you'll be pregs right away! Oh! And I O'd late and had a 32-33 day cycle too!
