Sorry! I know this is a starter ? re: Forkish’s new book

I am supposed to do the Day 5 dump and mix this evening. The starter has not been rising and falling yet. I’ve been using bottled drinking water and King Arthur organic whole wheat thus far. Maybe a few bubble on top throughout the days but no significant rise and fall. Should I proceed? Also, the ambient temperature of the room has been 68-70 . Not sure what I could have done different. Followed his directions exactly. Thanks for any advise! 

Addendum: I did the Day 5 mix. So, this morning there was still no gas or anything exciting. Still a blob w a few bubbles on top. Smells funky.