Award question...


So I've been feeling off past month. Feeling nauseous my period was a week late last month, plus super light. Now the last few days my cervical mucus has been more noticeable in my underwear.. and I'm a week late on my period.. and the last test I took was two weeks ago. It came out negative. Would I be wasting time taking a test or could something else be wrong..? Please help I need advise

Edited.. now I'm beginning to get slight cramping.