I was in my regular jeans until about 17-18 weeks - depending on the day sometimes I used my bella band and sometimes I didn't. I can still wear my regular jeans with my bella band now, I just don't because my maternity pants are super comfy.
Go to Motherhood Maternity in the mall (there's one at the outlets too) - they have maternity pants called Secret Fit something or other- they are the most comfortable pants I've found. The top part is super stretchy (so you could probably wear it now) and its made out of the same stuff the bella band is. Might be worth it to just get a few pair of those instead of the band, it really just depends on whats comfy to you.
I like the bella band, I just had issues because my jeans are so low cut, the top of the jeans would slip out of the band and I was constantly fooling with it.