af is really late

April

So i was due for af this past Saturday. I took a test Friday and its was negative. Took one Tuesday and was negative. Still no af but by boobs feel pressure on the sides and when i squeeze my nipples a few times milk comes out. on top of that i had a little bit of cramping last week. and ive been peein 2ce as much maybe more a day. could i be pregnant and the tests just not picking it up yet??