If you've done the HsG and the bloodwork, then I'd call them the next time your period starts. Tell them it's your day 1, and they will want you to come in day 2 or 3 for a sonogram (yes, it's gross) and bloodwork.
If you are doing injectables instead of just clomid, that might take longer to order, so I'd call before your period starts if that's the case.
Good luck!