I would go ahead and do those tests. You can still use that month as a month of TTC. The progesterone is just a blood test. The CCT is where they take your blood on CD3 for FSH and LH levels, then have you do clomid on CD5-9, then more b/w on CD10 (or there abouts). The HSG HAS to be done before ovulation, and supposedly that increases your chance to get pg in the next 3 months. So you are not wasting time doing those tests.
If you do that with your OB/gyn, that isn't a problem, but if you don't get pg that month, definitely switch to a fertility specialist (RE).
Good luck
