Can you get a fill during your period? in POST-Operation Weight Loss Surgery Q&A Posted June 22, 2010 Hey, I'm scheduled for my first fill tomorrow and my doctor hasn't given me any instructions, so I did a little research tonight in preparation. I found a site that said not to schedule fills when your menstruating because Fluid retention affects fill levels. :smile2: Now, of course I'm on my period and don't know what I should do. Should I cancel? I made the appointment weeks ago and didn't realize it'd be that time of the month. Has anyone had an adjustment while on their periods? Is it even possible? What did your surgeons say about it? Also, what else should I do to prepare? Do I need to not eat or drink anything before? It's being done via fluoroscopy. I'm so confused.