We also mentioned it to the pediatrician during our visit to her on Tuesday. She didn't seem to be to worried about it, we just have to do some exercises to make sure we train both left and right side. Jill also had her 4 month shots at the visit. Luckily she is done with them now for a couple of months, because both her and I don't like the shots. She cried and screamed again and Sean was with us for support this time, which helped. During the day she just slept a bit more but didn't seem to be affected by them in any other way.
So see here the result of practice session 1 "sitting strait".