Should I reschedule my lip filler or should I be okay?

If you've never done your lips before, then best to reschedule as you don't know what to expect.  But if you've done it before and you did well, then you can always ice more so then you normally would after the treatment and consider taking a Benadryl the night of the treatment as well.  At the end of the day, you may still be a little sore Saturday night.  The worse would be a bruise.  SO option 1 would be better than option two.

It's difficult to predict the amount of swelling you may have. Swelling can last 1-2 weeks after your injections. I recommend injections with cannulas to limit swelling. See an expert. Best, Dr. Emer