depo 2 patch 2 nothing

hi im 24 yrs old i got on depo when i was 22 a few months after i became sexually active. jan. 2010 was my last cycle of shots so in april 2010 i started the patch everything was normal til november i had a very lite 4 day period when i was used 2 having a period that lasted a week next came december a very very lite period that lasted 3 days then january came once again period was very very lite an lasted 2 days. i stopped putting on patch in january. in feb. period lasted 2 weeks an in march 1 week. since beginning of yr period has come on the 9th each month. but im question is how long will it take 4 birth control 2b out of my system in order 4 me an my fiance 2 concieve (conceive)? we have been having unprotected sex 4 about a yr now.

[Mrs_Moore]

sorry i meant my period in january was 2 weeks long