Well. I've decided (with input from DH) that i'm going back on the pill. I wrote down all the pros and cons and banded the idea about with DH, but we both think it's for the best.
I know my body too well from years / months of TTC, so it would be impossible not to think about how fertile i am. We would have to use condoms to avoid accidents, but i remember from our brief time trying to avoid getting pregnant last year that when it came to the crunch i felt like him putting a condom on was going against everything in me!
Taking a pill every day is not the same. It's not at the same time as actually doing the deed so it will (should) be easier to do.
At least this way it will force me to get on with things and not obsess about my cycles.