this is normal, not a stall.

you've lost 16 pounds quickly, probably water and emptying your glycogen stores mostly.

4 to 6 weeks is a stall.

MOST people experience the '3rd week stall' after induction.
Just stay the course do not cheat. Do not freak out.

Weight loss is a roller coaster, not a straight drop down the scale. and Yes, you will bulk up with water etc before TOM.

Please enjoy the new woe and learn to have patience. It's working for you, you're doing great!