Losing pant sizes while pregnant. Help!


So I’m 16 weeks pregnant tomorrow and I’m having the weirdest situation. I’m actually losing pant sizes. I’ve lost close to 20lbs while pregnant and now not only are my maternity pants too big, so are my normal pants! I went from an 18 (which are now falling off of me even with the bump) to a 15/16, which fit me everywhere but the bump. I don’t want to have to buy more maternity clothes since I already bought a lot this pregnancy, so any ideas on inexpensive ways to deal with this?