TMI.. But I dont understand.

So my calendar changed and moved my ovulation a week later then what it was before. I am supposed to be 10 DPO today and having symptoms. My boobs hurt, sense of smell is heightened, hungry a lot more, nauseous in the morning and at night. Well today my husband can home from duty (military) and we had sex. I went to the bathroom after and there was light blood. I don't know when implementation happens. Or if it could be the dreaded AF.. Any info is helpful! Thank you!