my surgery was on july 9th last year, i am 8 months post-op, and for the most part, everything is going well. on monday, my husband and i went fishing. to get to the lake, we had to take a side by side (golf cart like 4 wheeler), since then, i've had a tremendous headache. i'"m afraid the vibration from the ride caused it. has anyone else had this happen? if so, how long did the headache last? how long should i have waited til after surgery to have ridden an atv? should i ever ride an atv again? did i screw up what the dr fixed during surgery?