No worries Wikd, A braggot will ferment out at light speed compared to a straight mead. 5 days is prolly just about right even more so with 1 gallon. What yeast did you use?
Myself i primary everything for 2 weeks ale, braggot, mead. I only check my airlock for the first 36-48 hours to make sure everything is going well and forget about it.
I know the feeling my first few batches of mead kept me up at night too, and invaded all my waking thoughts. But i learned not to worry.
As for a blow off system. I haven't tried it yet but plan on doing it soon. But i would never go through that much trouble for 1 gallon. Every time i make a gallon of something i always say never again. Its just as much trouble for 1 gallon as it is for 5 if not more,knowing I am doing all this work for 1 gallon, actually end result is less then 1 gallon. But i must admit, i still make 1 gallons to help formulate recipies. But back to the point.
5 days and krausen should be tapering off, your still in primary phase but high krausen only last for a few days and now your yeast has to deal with a lower amount of fermentables and nutrients and a high amount of alcohol and will naturally slow. Sounds to me everything is going fine. The only problem you are going to have, is wishing you had made more braggot.
If i remeber right from your earlier posts you are making an unhopped braggot correct? All mine have been hopped which really makes no difference.(fermentation wise) But i have been thinking of trying an unhopped braggot.
To sum up this posting. Don't worry everything is going A OK!