How far along am i? :S?

Hi there ladies... my siuation is, i had the implant for 5 years in total. I had it removed nov 2009 ttc No.2. I had a period Nov 22nd, Dec 21st and Jan 16th and got ym BFP 7th Feb. Now januarys period seemed pretty normal at the time it wasnt as heavy as previous periods but i wouldnt say it was anything other than a period, so i am uming that was my LMP... How far along can i be because im so confused :D xx