Tabitha...excessive mucus means a change in bowel activity....even if it's ibs from stress or from food you've eaten or from the hormonal changes (which is most likely).
The fact is that you have UC, you're going to start your period and you see mucus. I'd say use the Canasa for at least 3 - 4 nights into your period..starting now...as a prevention to keep the rectum nice and quiet.
It won't hurt for you to use them...and I commend your observation.
One bout of mucus on stool...or continual...if it wasn't your period I'd say let it slide (pun) unless it got worse..
My take on it.
*Heather*Status:mini flare June 23* 6asacol daily+ Salofalk (tapered every 4th night)
~diagnosed January 1989 UC (proctosigmoiditis)
~5ASA: Asacol + Salofalk enemas (increase for flares tapered to maintenance)
~Bentylol (dicyclomine) 20mg as needed
~Probiotic 2 (Natural Factors Protec) + 1 (Primadophilus Reuteri) at bedtime
~Natural Factors Multi Digestive Enzymes with supper
~Ranitidine,Pariet (reflux) Effexor XR 75mg; Pulmicort/Airomir (asthma)
~URSO for PSC (or PBC) 500mg X 2 daily (LFTs back to NORMAL!!)
My doc's logic.. "TREAT (FROM)BOTH ENDS" worth it !!!