My mom lives in NY now and she only comes in once a month, so I can't get the help from her I need. Alexis just refuses to use the potty. She'll play with it and put other things in it, but when I try to sit her on the potty, she screams like she's being murdered. I don't want to rush her and make her afraid of it or something. I bought her some panties and let her pick them out....I let her wear them and she just goes in them like a diaper. HELP! (She's almost 18 months, for the record) Is she behind or is what she's doing normal?