Yes! My cycles are very similar. My last one was 76 days which was by far the longest I've had (since I started paying attention, lol)...but the one right before that was only 20 days. Before that it was 51, 48, 35, 39, 37, and 43. I know just how you feel...it's so frustrating to be coasting along with no temp shift and thinking "wow, this is already long...and I have 2 more weeks after I O..." I'm on CD 13 today and it just occurred to me that if I had normal cycles I'd be fertile already.
I have no idea why mine are off either. They've always been that way, but I never really paid attention until we started thinking about trying, and that's when I realized just HOW irregular they are. I asked my doctor about TTC and she just said "oh well it will probably be harder since you won't know when you're ovulating, but see what happens." I'm thinking that after this cycle (assuming BFN) I'm going to see a fertility specialist. It's so disappointing to just go day after day after day with no signs of O.
So please, vent away!