From reading many websites and forums over the past few weeks I understand that the hormone changes that occur when you are pregnant are sometime undetectable to pregnancy tests. Have you been to see your gp and requested a scan?
It sounds to me that you are pregnant (i hope that is what you want to hear) as you seem to have a number of symptoms. Movement can be detected about 16-22 weeks, the hormone changes sometimes makes a line appear as you described. According to a website I was reading yesterday, discharge can occur from your breasts at about 5-6 months!
I would suggest that a scan is the only true way to see if you are pregnant. Speak with your dr and let us know what happens. I hope you get the answer you are looking for.
Good luck.
Xx