Basically I had sex for the first time ever last Wednesday, and as I'm on the pill we didn't use anything else. We did it multiple times over the next two days, and then I bled slightly about three or four days after the first time. I didn't think anything of it, but I keep feeling nauseous in the evening, but as I've been out I can't work out if that's linked to drinking or not, but that's only been three nights since then. I googled it, and apparently you can get implantation bleeding 3-6 days after conception.
I'm really worried, when is the earliest I can take a pregnancy test? I'm on microgynon 30 so there shouldn't be a problem... although I don't take it at exactly the same time every day, does this matter?