I was on a 35 day streak and the system changed it to a 2 day streak. What gives?!\
According to your activity, on 2/7 you didn't earn any points. It appears you followed 2 users, but did not do any translations or complete any lessons.
So just to be clear - you have to earn coins every day to maintain your streak?
Yes. You have to earn at least one point. You can do this through completing a lesson, getting an answer correct in a Timed Practice, translating a sentence in Immersion, voting for a sentence in Immersion (tier level 2 and above only).