Hello, i'm 5 days late on my period and 1 negative test.?

My husband and I have been trying for 9 month now, but these last couple month we haven't really calculated when to conceive. We figured it will happen when not expected and it's less stress. I am now 5 days late. Last week my face broke out and i had a terrible headache for 3 days, which i never ever get, my are sore, not more than usual and i have been extremely emotional, when should i retest?