When should I test

I’m 3 days late! Truthfully have never been late before, I have always been on time. Normally I suffer from cramps 2 days before my period and the first day of my period. I haven’t had any pains at all, a little dig on my lower stomach here and there but nothing like a period cramp. I had a bit of brown discharge/Spotting on the 10th and the 11th! Lately especially as I’m in bed going to sleep and first thing when I wake up I’ve felt very nauseous! And I’ve lost my appetite a lot in the sense I’ve been eating things I either haven’t eaten in ages and I’ve been turning away from things I would normally eat. I don’t want to get my hopes up and then nothing😶