Faint pink line on first response test, am I really pregnant?

My first day of my last period was the 25th Dec 2010, my cycle is 28days and i ovulated on the 8th of Jan 2011, me and my partner tried the 7th, 8th and 9th of this month, my period is due the 22nd of this month, took a first response pregnancy test this morning and it has a faint pink line i am 11dpo, 4people have said to me that they could see this as i thought i was seeing things. Does this mean that i am pregnant for sure? Don't want to get my hope up to much just in-case. Do hope it is a BFP!