Signs change depending on the person....
Most women naturally/instinctivelt know ; I on the other hand felt severe nausea and became so tired I would practically fall asleep eating/ddoing the dishes or having a shower.
Taking the test is easy, cheap and a reliable way of knowing. Make suee you read the fine print but, some test days before next period others after youe last
Oh and anything can be a sign of pregnancy really.... so do test... all your signs could just be coz ur stressed and worried...
Just take tests and you will know!