Hysterosalpingogram

Stasi • I`m 26, husband and I have been ttc for 4 years for baby #1
Husband and I have been trying for 3 years went to my ob and got blood work done and that came back normal now she wants to do a hysterosalpingogram on me. Just want to know who went through it to give me a heads up on what to expect. And if possible how long after getting it done did you got pregnant? Thanks :)