Kit- my charts always looked sh*t, I do shift work too, thats why I gave up it was stressing me out too much. I gave my FS one of my worst charts ( we were camping and getting up at all different times) and you should have seen his face! I just use OPK's and go by them. I don't know how people regularly chart, I find it so difficult but saying that FF educated me a lot on different signs etc.
Hope it becomes clearer for you, maybe eat a few more chips hehe they always make me feel better

I'm going to get my haircut and coloured, will feel better after covering my grey regrowth!