Can I take i test now, or wait till the morning?

My first day of my last period was Jan. 31. I took 3 tests and they all came back negative, but that was only after a week of my miss period. around the time my period was suppose to start but it was very minimal with cramping only in the morning. I did the baby calculator thing to see how far along i would be if i would be pregnant and it estimated i am 7 weeks. I do not have any signs that i am pregnant so far because i convinced myself that i am not. But this morning I totally snapped at this guy for no reason and that is unlike me. I have an extra test but i was curiouse as to if i should take it in the morning, or would i be far along enough to take it as soon as i get home to know?