Could I be pregnant?

Nichole
We have been trying to get pregnant for a year!  Unsuccessful, obviously!  But, right now I have been experiencing headache, lower back pain, extreme fatigue, nausea at very scattered times, some very mild crampy feelings, jumpy muscle in my low abdomen, and some slight constipation.  I am five days before my period should start, and I have never felt these things before my cycle.  I usually just have cramps, some irritability, and then it comes!  This is quite different!  I'm afraid to test though because I don't want to see another negative!  Opinions, please?  ☺️