I had to switch to maternity jeans about 2 weeks about and LOVE them!! I too favor the over the tummy ones. I am actually going on my lunch break to get some maternity jeans right now I just have black slacks for work.
20 wks 4 days. Still in my work pants. I put the metal hook where the button goes and zip half way. That gives me a little more room. My tops cover it so it's not obvious. I ordered maternity bands online from ebay. Much cheaper than target, but i haven't used them yet. I wear leggings or jeggings on weekends.
15 weeks I stopped fitting in my pants
I adore maternity pants from ohbaby. They feel like jammies but look like work pants. I work in an office and was dying b4 finding these. Third pregnancy and started wearing them at 15 wks. Personally I favor the over the tummy ones rather than the under the belly...but that's just personal comfort.