>>I messed up my temperature chart in October (thermometer battery died and I didn't get a new one in time).

Hey in the olden days how did we ever manage to procreate without batteries??!!

I think you are on a good track... as to "When should I start worrying?" I have to say NEVER because worrying is only going to make it worse. You want to relax, follow your ob/gyn's advice, and don't forget to also ENJOY YOURSELF!

This made me think about the TV show "Mad About You" where they spent a season trying to get pregnant... they had trouble and were both checked for fertility, turned out the husband was OK and the wife put all sorts of pressure on herself. They started to drift apart and a little bit of mistrust. Then there was a scene where they finally got all their emotions out, and she said she was scared because she knew he wanted children and what would happen to their marriage if it turned out she couldn't have a baby? And he said to her "When are you going to understand... there is no such thing as 'you can't have a baby', it will always be 'we can't have a baby'... we are in this together! If we can't have a baby we'll adopt or do something but we are in this together!"

So finally the tension that had been building for the last several episodes was gone... and the final scene in that episode was the wife in the bathroom looking at the stick from a pregnancy test and smiling.

Did I go off base here

Anyway GOOD LUCK!!! Don't put pressure on, and enjoy yourself!