welcome to the forum! i'm sorry to say that you had a male plant in there, dude. your male pollinated your female plants (producing seeds) and ruined your bud. sorry. you gotta make sure you seperate your females and males so you don't get pollination. try again and do a ton of reading in the FAQ section.
There are alot of things I'm no expert, so here's what I know. Light leaks during lights out is always at the top of the list. To hot or to cold for long stretches. PH in soil/water to high or to low. Over/under on the nutes. I'm sure there are more but this should help.