Chemical Pregnancy and HSG

Cait
This cycle I had my first chemical pregnancy. It was pretty upsetting to get that positive and then have it end up negative. Now; my OB wants me to get a HSG next week but otherwise treat this cycle as the others. I start my femara tomorrow. 
What should I expect the first cycle after a chemical? Is everything the same? I've read some people ovulate at different times after one. Anyone experience this?
Also, other than take ibuprofen any advice for the HSG? 
Thanks ladies!