Hey I accidently dry fired a hackberry long bow today(arrow slipped off the string) Bow looks completely fine tho. No cracks anywhere! Should I worry or no?          

Should be OK, especially if you had a B-50 string on it instead of fast flight.

Shooting selfbows over the past 20 years I've had quite a few nocks breaks with snap on nocks and a couple slip offs with mercury nocks.And never had a bow problems.Even with high poundage bows and fast flight strings.