Hi Mummabear,
Sounds like everything is fine. As long as the circumference is ok. The BPD and all other measurements are an average, but we are all born slightly different, some of us with more oval skulls than round. If your OB is not at all concerned, then you prob. shouldn't worry too much either!
My girlfriend was told her baby had a more oval shaped head and a little chin, and that perhaps he would need surgery after birth to correct his jaw, what they didn't see was that her DH has exactly the same shaped face, slightly elongated with a small overbite! As it turns out bub was perfect, had a head and face shaped just like his father!
Try not to worry too much or think about it all the time. Easier said than done though, but it really sounds like everything will be fine. :hugs: Hope you're feeling better.