Late period, early pregnancy symptoms. HELP

Lauren
Hi everyone, 
Just need some advice. I'm 3 days late for my period, I have no signs of it starting. I've been feeling nauseous, have sore breasts, feel exhausted and irritable. I took a test yesterday morning that was negative? When should I test again? 
I'm really nervous as this hasn't happened before and we've been trying for a year. I was on the depo injection which stopped in October 2015 and only got my periods back about 5months ago but they have been regular. Never late always on time or a day early
I'm a complete novice so I'm sorry if my questions a bit dumb 🙈