I have some discharge every day too Emma. Never thought I'd miss the days when I had to wear liners/pads/tampons only 5 days a month. Now I am in a liner, every day. 
Definitely double check with the sonographer but I have had clear liquid discharge a few times too (that even smelt sweet) but the amniotic fluid was unaffected. Its just another joy of pregnancy.
Loving all the lovely scan news.
.. My growth scan is on Monday. Can't wait.
Took a day off yesterday to relax at home but ended up burning my hand. Second stupid incident after I wore 2 earrings in one ear for a whole day without realising. DH is convinced that I cannot be trusted alone anymore.