Hi,i am ttc from last 2 months.last month we had intercourse on 21 till 30.my periods were due on 5 oct.i had last periods on 7 sept.i am having some symptoms like tiredness,bloating and heavy stomach,feeling hungry after 1-2 hrs which i never felt usually,i had severe cramps last 3 days now they are mild and back pain.i did the test on 6 oct it showed big fat negative.when to test again?and am i pregnant?