*FIRST RESPONSE PREGNANCY TEST*

So, I'm officially 6 days late. I have taken about 4 pregnancy tests (First Repose Early Detection) and they have all came back negative. I've had a few little twinges/aches which have lasted a few seconds but other than that, nothing. Ziltch. Nadda. My last period was 25th July, and I have had unprotected sex a few times this month, one of those being on my "most fertile" days. However, I do have PCOS, but even with this I've been getting *mostly* regular periods for almost 4 years since coming off the Implanon. I was also actively TTC a few years back but to no avail. I really highly doubt I am pregnant, but has anyone taken these tests after being a few days late, came back negative, but you late found out you were pregnant? Thanks!