I had this issue in the last week. My boobs grew another cup size. I'm a G cup now!
I used to be a C cup looooong ago (pre-kids). I gain cup sizes with each kid.
On Sunday, I went to put on an XL buttondown shirt (good quality one from a real maternity shop - got it on clearance when they were going out of business), and this shirt fit the whole pregnancy last time, but Sunday I couldn't wear it. The boobs were just too big, and it was pulling apart at the buttons.
And several other shirts are now unwearable as well.
I also have the problem with the empire waists going across the boobs instead of under them. These tops are not designed for larger cup sizes. They really need to have full figured maternity clothes available... really full figured.
Pants also stopped fitting. I think my hips have spread, because a lot of XL pants I can't even get up over my hips. The belly is not the problem!
I finally found a pair of capris at my local consignment shop - $5.98! And they have the wide elastic band that goes across the belly button. This is what is comfortable to me and it doesn't fall down like everything else does. These pants even have real, full size pockets!
: It's the In Due Time brand, which a friend said was what Target used to sell? The Liz Lange stuff Target sells now never fits me at all. In fact, MOST pants at various stores don't fit me. Grrrr.
I got some T-shirts from a friend that are stretchy enough to work. They're Motherhood brand, but are pretty old probably. Must be, because they aren't falling apart!
I also found a size 16/18 non-maternity dress at Walmart in a stretchy material that I can wear for church. It fits and has growing room. 16/18 is my normal size non-pregnant.
My non-pregnant skirts still fit, because one is an elastic band that stretches a TON (I can pull it 6" out in front of me still), and the other is a wrap skirt that I made, with 3 button holes. If I need more button holes at some point, I can just add them. I have plenty of wraparound fabric in this skirt. I just don't have nice tops to wear with the skirts, since my boobs don't fit in any of my nice tops.
: