So two weeks ago my boyfriend and I had sex and he came inside me I took a plan b about two or three weeks before that it happened and I took a plan b for the first time my period was supposed to come 8 days ago but it hasn't I know the side effects of plan b is that it causes a late period but I don't know when it's supposed to come not only that but I've been feel nauseous in the morning for the past couple days but it goes away when I eat and I always

Feel fatigued and like really emotional idk what's wrong and I've taken two tests and

They were negative my next step is a blood

Test.