nothing fits

I'm 30 weeks pregnant and none of my clothes fits, I got small size maternity jeans when I was 12 weeks pregnant and been wearing those since and now those jeans too getting tight. The Weather is changing, I don't want to send a lot of sweaters,my friend told me she wore her 30 week maternity clothes even after delievery.  is it that even after pregnancy I will wear maternity clothes for few months. Will I be this huge even after delivery. Anybody having clothes problems and don't want to spend a lot on clothes.