Not feeling pregnant

Maria
I'm 19 weeks and 5 days pregnant. I was having all the usual pregnancy symptoms feeling the baby move the usual. But I woke up yesterday and I don't feel pregnant anymore. I even feel like my belly shrunk a little. This is baby #3 for me and I don't remember feeling like this with the first two. I think I feel the baby move but I'm not sure anymore. I have a dr's appointment on Monday. Not sure what to do or think.