you will be fine, but what grower doesn't use a timer for their lights. get 2 if you need em, it takes way less thought. late
this is like the 3rd person ive seen say "youll be fine" after someone fucks up their light cycle. people, please listen - plants definately risk hermying when you even give them 1 hour of extra or lack of light. look at what he just posted, he got hermies - i didnt even have to read to the bottom of the page to know this would happen. there was another thread on another section just like this, his situation was different though. but seriously, im a little tired of ppl being so naive about what stresses plants. there are LOTS of strains where you can mess up the light cycle, but not all genetics are the same. especially genetics where there are alot of crosses, the stability is put into question simply because certain strains have certain phenos that are prone to hermying if stressed a certain way - this is simple science, ive seen different strains hermie under certain conditions where light fluctuation was involved through many of my & my buddies grows - where over 10 strains were involved each time.
bro, i feel your pain. this happened to me on my first grow, i slept in 3 hours and they hermied. however, the weed was AWESOME!!!! and it did crackle a little bit, but the seeds were teeny tiny cus it hermied on about day 30. since youre only 3 weeks in though, i really dont know how big the seeds are gonna get. you'll still have good weed, STOP CUTTING OFF BRANCHES!!!! youre gonna make it hermie again.