Pregnant or not pregnant ?

Sooo my period will be a month late on the 14 of this month. I’ve been feeling sick, even threw up the other morning. My nipples have been very sore the past week and I’ve been having headaches on and off. Up to last week (before throwing up) I took a cheap test and it told me negative. In total to date I’ve taken about 4 cheap test and 1 clear blue and they all say negative. After throwing up 2 mornings ago I’m really starting to think maybe I am pregnant but am scared to test because I don’t want another negative. Advice? Thoughts?