She may be pulling her legs up like she has wind...

But if you lay her on her back on the floor flat, gently press her lower belly - if she is constipated it will be quite firm, you will be able to feel it.

If you think she may be but aren't sure, gently press and rub her belly at the same time in clockwise direction with your fingertips - this will help get things moving. Also the moving of her legs in circles will help as it does with wind etc.

I didn't FF but from what I know there is no need to move from Step 1 of S26. The other thing is most bubs I know that were FF on S26 couldnt have the "Gold" - there was too much whey protein in it and they all got constipated etc.
A little brown sugar in some warm water may also help if she is blocked up

HTH And you aren't a bad mummy for not knowing