How does it smell?
I can't tell from the pictures if it's good or bad, but, my scoby just died and I dumped the lot because mold formed on top. There was a pretty unpleasant smell - not so much as you'd notice it a couple feet away, but not good. K has always had a pleasant, albeit vinegary, smell to me. I knew something was wrong because the smell was off. I know you're not too experienced, but give it a sniff. If it smells bad, toss it. Smells good or you're not sure, let it ride a while longer.
Regarding my scoby's sudden death, it's strange. It had been going strong for many months and I've made maybe 20 gallons of excellent K all told. About a week ago, the scoby was about 4 inches thick and I removed 2/3 of it, added new sweetened tea and put it back where it usually sits. Carrying it, some of the liquid sloshed up to the cloth covering the top and then dripped back down and I think there was probably residual detergent in the cloth. A day later the scoby sank (it's always been a top floater) and then a new skin formed which started to grow fuzzy spots. It might have been something else, but that's my theory. - Sad. Will start again next week.