Question..

I'm 9dpo and AF is due the 19th according to glow, I took a pregnancy test yesterday morning and it came back negative then took another one later on around 4 well it didn't say anything when I went back and looked at it I got a faint positive. I took one this Morin and it was negative. I've ad cramps and my boobs have been sore and I've had frequent urination, and really tired. Could I be pregnant??