most people do lose some hair, but it's usually just "shedding" that no one is going to notice except you. If it's noticeable, you can always get it cut shorter so it's less noticeable. I actually lost very little hair. Having it come out in clumps (similar to someone on chemotherapy) is pretty rare. I wouldn't have noticed my hair loss by just looking at myself in the mirror - I could just tell by looking at the amount of hair in my comb after I combed it out after washing it - definitely more than usual for about four months or so.
if it's going to happen, it's going to happen, and there's not much you can do about it other than keep on top of your protein and vitamins to keep it from getting worse than it is. Keep in mind that it's temporary - it'll last a few months and then grow back. In the grand scheme of things, it's kind of a minor issue, although I know a lot of people worry about it (I did, too...)