I subbed on a crew last night. The R for the game said that in Ot each team gets 1 TO plus any that carry over from the 2nd half. All I can find is that 2nd half ones carry over...is there any rule (NFHS) that says they get extra TO's for each OT period? or is this simply NCAA??

If strictly NF, yes
 

If strictly NF, yes, they get 1 additional TO for each OT period. See "resolving tied game" in back of book and 3-5-1.

Just remember that each state association has the authority to determine what procedures (if any) are used to resolve games that end in ties. The recommended NF procedure is used in some states; others use the NCAA procedure, where TOs do not carryover from regulation nor from OT period to OT period; still others use a modified version of either procedure, or no procedure whatsoever. Check with your state association.