Here's the thing. Most doctors want you to wait a year so you've had a chance to lose weight, and hopefully get to a healthy pregnancy weight, and also to establish new habits. The healthier YOU are, the healthier your pregnancy and baby are.
With that said....I got pregnant before I was a year out. I was banded in June, was pregnant end of April/beginning of May. Not too far from the one year mark. By then I had lost all my weight and gotten to where my doctor wanted me to be. I had no idea I was pregnant until I was in the second trimester.
Meanwhile, I did have some slight morning sickness. I thought it was just a stomach bug and my regular PCM gave me Phenergan for it so I wouldn't vomit and risk slippage of my band. Then my band tightened!! That was NOT comfy at all. I really had no idea what was going on but I was going to stick it out until I had my next appt with my surgeon. Well, my period went on hiatus and all I could think was if my pcos is back after I have lost all this weight I'm going to lose it. So I took a home pregnancy test so I could tell my PCM I had and it was negative....well....it was positive. I did have to have 1.5 cc's taken out of my band so I could eat properly. From the end May, until July 19th, I had lost more than 12 pounds because my band had tightened up so much I could hardly eat anything. I wasn't getting sick, but I wasn't eating much at all.
That was alarming for my doctor, so he had me down immediately to do the unfill. Since then it has been smooth sailing! I am now 22 weeks and everything is going well.
The only advice I could offer is just to make sure you have your new habits established first.