Pregnant?

Bethany • 💖❤Mommy of beautiful 2yr old baby boy an now pregnant with a baby girl an baby #2💖❤

So I have been having all the symtoms of being pregnant but I have taken 4 tests and they all came out negative and I took them within the 7-10 day period and this is also my second child if I am pregnant and just want to know if it's possible that I am pregnant but all the tests I have taken are not registering yet and I should be about 3-4 weeks