opinions on when i should test?!

Taylor
Hi guys ! i'm 3 days late on my period and i wanted to know when you guys think i should test again, i took one last night and one the night before and they both came out negative. My boyfriend and i have been trying to conceive recently and we're praying this is our chance! opinions or advice ????
UPDATE: i forgot to mention i've been getting nausea almost instantly after i eat anything i never throw up just feel sick to my stomach (which has never happened), i've had a lot of lower back and hip pains, and i've been sleeping a lot. i went to bed at 7 a few nights ago and didn't get up til 7:30 the next morning and was still tired.