Do I need to seek attention because my dogs tail smacked me in the eyes? I'm 5 days post-op.

If you are not experiencing any pain, blur, watery eyes, or light sensitivity, most likely, your flaps are intact. However, if you have any trauma to the eye, it is best to return to your doctor for an evaluation to ensure that the flaps are not moved. 

While it is unlikely that the tail of your dog hitting your eye 5 days post op did any damage, if you noticed any changes in your vision beyond 24 hours, I would get it checked by your surgeon to be sure there was no movement of your LASIK flap.  This could be easily corrected but if you wait too long, and it did move, it could heal in the wrong position and be more difficult to correct.

They should look at you. It's better to catch things earlier than later. Although it's likely you are ok, it's impossible to tell online. There's also inflammation that can occur in the flap interface and that may change how long and what kind of eye drops are used.