Late period

I am 4 days late for my period. I haven’t been late in over 6 months. My husband and I aren’t preventing pregnancy but we don’t mind at all if it happens, we would be happy either way. So we don’t use any protection and towards the end of my cycle, about a week before my period, he will go inside of me. Any other time he pulls out. I normally start spotting 3-4 days before my period. I have no spotting and no bleeding, just some light cramping on the right side. I took a pregnancy test yesterday and it was negative. What should I do if I still haven’t started my period in a week?