There is no nicehash traffic on the pools now.

You shouldn't stop mining, even if the difficulty is high and you are not finding blocks the pool will keep accepting your shares and this will be added to your reward when a new block found. If you stop then you will not have any shares from the reward.

As for now you may see the difficulty have got higher you will also notice that block reward have been going up so for some blocks the rewards were 1200-1400 coins per block. This way above the normal block rewards which is 150 coins.

Here comes the dynamic block reward as I told you before