4 days late

Shay

I ovulated on the 27 of May and BD two days prior. Did my 2WW and got negative results a few days ago. I spotted a few days after ovulation. I’ve been experiencing sore boobs, backache and mild nausea ever since 5DPO & now aunt flow is 4 days late but I’m afraid of testing again and getting a negative, ive been getting my cycle regularly so it’s weird that I’m this late.. when should I retest?