scared, paranoid, sad, excited, stressed...etcetc + +

These are all the feelings I'm getting about having to go in and buy a bike (it's been a few years and a few dozen pounds since last time). Despite the fact I'm totally thrilled at the prospect of riding again, I'm a bit worried about the bike shopping experience. I think this comes down to the fact I'm not a small or average sized rider. When I hear things like replacing tires and broken spokes I'm worried I'll test ride a bike and it'll break under me or I'll end up with something that will last two rides before I need to change something on it to support me. I'm around 275 and will be looking at hybrid bike along the lines of the Trek 7.2/7.3, and possible a couple Specialized (also taking model suggestions). I know there are many other female riders here of similar stature and I could really use some advice on which thoughts are realistic and which aren't, or successful bike shopping/testing stories. Knowing other riders around my size have successfully ridden these will be a big help (I know it's probably silly, but this is a big step for me).

I can't wait to ride *once* I get a bike and I know it's appropriately durable for me, and will be trying my hardest to set aside thoughts about how I look riding on said bike, but it's a struggle to feel good about (or even willing to) bike shopping right now.