HSG Test/Late period

Kayla
Looking for anyone that has had an HSG done and had a similar experience. 
I had mine done on December 30th (CD 9), and I am now on CD 31 with no sign of AF. I've taken 2 EPT's - both negative. I have super regular 28 day cycles so this is very strange for me. 
Has this happened to anyone else? 
Trying not to get my hopes up since hubby and I have been trying for 2 years with no luck.