That's a tough one. Most will be clueless quite honestly. They're not really trained in hormones in med school. Now an endo or Uro would be more specialized but again, they don't have real world knowledge of hormones at all unless they've taken a personal interest. Also you need to be careful what and how much you say to a doctor as it may make it into your file, which you don't want.
When it comes to blood work on cycle you can always just pull it yourself via sites like
www.discountedlabs.com or
www.privatemdlabs.com. There are a few states that don't allow it but the majority do. It's much cheaper than you'd think. Just fill out the request on line and then go to your nomal Labcorp, etc.