It could be, but it's more likely to be that you were ovulating (clear discharge) and now you've finished.

Usually, that happens for a couple of days, and then you should have "dry" days until your period. If your period doesn't come and then you get the white discharge again, or just more dischrge than usual, then that might mean you are pregnant.
Are you trying?
Good luck!!!

Yeah im ttc hehe hope I succeed this month =)