In reply to G. Tiger, Esq.:
Difficult to say without more info, but i'd suggest you may be too stretched out and you may be therefore holding your head up too high.
Perhaps try raising your bars slightly and/or using a shorter stem.
A good "rule of thumb" as a starting point is that if you're riding holding the drops, then from your natural eye position look down at the front hub, it should be obscured by the top of the bars. If some part of the hub can be seen behind the bars then you may be too stretched out.
I stress that this is merely a starting point though as everyone is different.