How soon can I take a test?

Brylee

So I just started a new pill pack (i've been on the pill for 10 months) and i took one pill late but other than the one every other pill was on time. I also had unprotected sex after my period for about 4-6 days and yes he did come inside me.. and then he came inside me again when i started my new pack. i have brownish discharge right now.. is it possible I am pregnant and it's implantation bleeding? how soon can i take a test?