I mine on Ryzen 1600 with 200 kH/s and got nothing in 12 hours

stay at it. difficulty has climbed up and sometimes it takes a long time to find a block but then you might get 2 blocks in a shorter span of time. true randomness
I've got only one block in 36 hours...

I will wait a few hours more and will stop mining...
I may have been a bit optimistic when first mining and got 3 blocks in 36 hours, now 24 hours later and not a single block. I think I'll give it 24 more hours and see what happens.
I have the same problem, my last block was found 27 hrs ago.