Baby formula changed to REGULINE!! Help!! (Btw has my sons butt picture with poop)

Switched to REGULINE because he was having trouble pooping for the past two days. He started last night with the REGULINE formula and already has had like 6 bowel movements and his poop is kind of like little fluffy balls.. My question to you girls that have used this formula is #1. How long till his BM are normal ?? Or will he continue to have so many BM everyday now?? #2. Is it normal for poop to be like little fluffy balls ?? (BTW I WILL BE ASKING DOCTOR TOMORROW HOWEVER THEY ARE CLOSED AND WONT BE ABLE TO CONTACT THEM UNTIL TOMORROW.)