Linzess - initial days - is this normal?

Have GERD, Gastritis, mild Gastroparesis, & chronic constipation for years now. Have had partial blockages as well.

GI had me on 4x of Miralax daily for some time and has now put me on LInzess 145.

So, Friday an hour or so before dinner I took magnesium citrate (per my GI) which resulted in a loose BM. Dinner was chicken soup, mostly broth.

First thing Saturday morning took the Linzess with a total of 48oz of warm water within a half an hour. Then took my Omeprazole (20) and another 32oz of warm water. Had 4 very liquid BM's in short order. A little later in the day had another very liquid one and then a very small soft one.

Sunday - same routine - nothing at all. Had a lot of bloating and some upper abdominal pressure. By afternoon the pressure was gone after passing a bit of gas.

This AM - same routine - nothing at all (I wake up most days at 3AM which is why this post is so early) and it has been 2 1/2 hours now.

FYI - most days I will drink a total of 100-120oz of water plus other liquids.

My GI told me to wait at least 3-5 days and then to add either Miralax or Cirtucel depending upon the consistency of my BM's.

Is this normal for when you start on Linzess?

Thanks in advance!

Linzess work very well for me. No other additional meds were taken.