Can someone explain, my reward seems to be about the same for each block. Is that right how it works? Even if I have lets say 5THs miner setup and it takes a week to find a block, I will get same reward ? And then its also possible on other hand to find 10 blocks in one day and get reward for each one within that time period?
That is correct. You get a share of the pot and assuming all players are in it the whole time, your share will be constant.