Hsg test

Ashleigh • Engaged to my best friend and soldier. We have a 5 year old son, and currently ttc our second ❤️
Around when were you scheduled for your hsg? Or do you pretty much have to ask your doctor for one to be done? 
How uncomfortable is it? Or what should I expect? 
Any success stories out there? 
My doctor isn't very helpful. So far I've had blood work done and found out I have hypothyroidism, which I'm on a medication for now and that's taken care of. But not sure what to do from here now.. Any help would be greatly appreciated. I have a 5 year old son from a previous relationship. My husband and I have been trying for a little over a year now.