Rachel, if i were you i will change the IFC if i'm not comfortable with it, since it is taking care of ur bb, who still cannot talk and voice complaints. what you mentioned here are only things that you see, when you are not ard, more things could have happened. i spent abt 10 mths to source for & try out preschools for my #1, and changed immediately when i didn't feel good. finally settled him down with the 3rd school. i think it's better to change early b4 any -ve environment have much impact on our kids' development.
Last time for my #1, the IFC was actually good, but he started to fall sick too regularly after 6 mth old, so we got a maid at home to take care of him, more economical. but again, getting a good maid is not easy.