Aww hun your not a bad mum
I remember the first time I went to Gym and put Ds1 in the care...OMG They came and got me right near the end of the class and said he was upset...well upset was an understatment he was hysterical and they had him in a highchair letting my poor baby scream his little heart out...he never went back...as it goes against all my parenting ways...broke my heart So I totally understand...just do what feels right hun x

As for the swimming I dont see why they force babies who are clearly unhappy to do the lesson...we take the kids out if they are upset and would never leave them when they are distressed.

but like I said follow your heart and instincts xx