Period is 8 days late

Jessica

This is the first time I’ve ever been 8 days late before. I took an easy at home pregnancy test at 6 days late and it was negative, then first thing this morning, 8 days late, I took a Clearblue digital test and it also showed not pregnant. I’ve been off and on nauseous the past two days and my nipples are extremely sensitive, I’ve been tired a lot lately and have had clear sticky CM. I don’t really know what to think…