Hubby is stopping off on the way home to grab another test tonight.

I took the test early this morning as I just have been feeling off and had an inclination that I may be pregnant. I have cramps, sore boobs, backache etc. I’m just trying to work out how far I would be. I’m not due on for another 4 days. Could the test have picked it up so soon or am I further than I think? I had spotting around 28/29 July. We had unprotected sex on my period just gone and a couple days after ovulation