Amanda- please dont stress yourself, though I know it must be hard given all you have done to get your little girl so far. Remember the following:
- You only have a 20-25% chance of becoming pregnant in any cycle
- Timing is only one part of TTC a girl - you have been taking supplements to alter your PH and you have DTD regularly throughout your cycle, therfore there is probably a higher concentration of X (and a lower concentration of Y).

Good luck. I really hope you get your princess!!