Thankyou everyone for all your comments. I didnt know that canderling was that important. And that you could tell from canderling to raise the temp. I have now discovered that the termometer was low. I put in another one in and I have two different readings.
You all have been very supportive...
I have just cracked open 5 out of 6 eggs. It is day 22 and the air sacks were very large. There was nothing inside but yolk I have left one it does look different to the other 5. I will give it a day or two. I was surprised that they did not smell, even when I broke them open.