Pregnant or not pregnant!?

Tatiana
So, we are ttc baby #2! And I am 4 days late for getting my period. I have symptoms of being pregnant such as spotting, fatigue, naseau, tender and full breasts. I took a pregnant test on Sunday and it was positive.. but then Monday had a negative test, Tuesday positive and again today had a negative test. Short of waiting it out and testing again I'd like to hear others thoughts...