I used to work there. (for almost 3 years)
A. What I always told people was this. Start with a lighter set...both lighter in scent and heavyness of the product. Cucumber melon and Moonlight Path are both very light scents. The regular shower gel(as opposed to the creamy bodywash) and the regular body lotion.
B. Bath and Body Works has a great return policy. If you keep your reciept, you SHOULD be able to get your money back if you have a reaction(I say should becuase they may have changed it, but if you get a nice manager, they will usually do it). Heck...I have HAD to give people store credit(no receipt) when the bottle was empty. (It was this same lady, she would return like 8 empties

)
C.
If your skin is sensitive enough for you to have a reaction within the time you are shopping, use a demo...leave the store...finsh your shopping and see how you feel. If you don't think you'll have a problem, go back and buy.My favorite scents are Midnight Pomegranate, Sea Island Cotton, Twilight Woods and Vanilla Noir.
OH! I alost forgot. There is a line of products called True Blue Spa...they are not heavily scented and are mostly shea butter based. I would recommend these as well