I put on a pair of white capris I bought shortly before finding out I was pregnant and they wouldn't button today It's a lot earlier than I thought! So I did the old loop a hair tie through the buttonhole trick lol!!! I guess I'm going out to buy some bellabands!
Re: not fitting in clothes...
... every single day of forever.
I didn't use a bella band because I was afraid my pants would fall down. I just bought maternity pants early on, and even though they were a little loose in the beginning, I felt like I got more wear out of them. They can get pricey to only wear them for a few months.