Should I test?

I tested Thursday and got a bfn. I ovulated either the 7th or the 8th but my predicted ovulation was suppose to be the 5th. So I tested early just in case. I have felt nauseous for about an hour or two this morning and yesterday. I have sore nipples but no heavy discharge or dizziness which is usually what I get with my pregnancies. Can you not experience pregnancy symptoms and still be pregnant? This was my test from Thursday.