You have to either be on your period or just off your period for the nurse to give you a shot. I was on depo-provera for 6 months and my husband and I didnt use any other form of birth control he came inside me every time. You only have to wait a few hours for the shot to be 99.9% effictive. But girl dont do it.....I was on a very heavy period for the whole 6 months and had vaginal dryness other wise then the period. The pads/tampons cost a fortune omg I thought I was going nuts with the period. Thank god I stoped depo-provera and got on the pill I am now on tri-levlen 28 but I am have some probels from it as well but that god a constant period isnt one of them.

Hey thanks for the reply. Well I am not too worried about the side effects... I guess it would be a bad experience if that happened to me, but i'll never know unless I try it. I know side effects are different for everyone. If I start getting my period for too long lol I will stop getting the shot. For some reason I don't think that will happen because my period is weird anyway. Hmm hopefully that dont happen to me.
Well my sister is a nurse and she is going to give me the shot at home but (i know I should ask her this) but what if i'm not on my period/not expecting it for a lil while longer... Will it still work? Should I wait a week or two after the shot to have sex?

I would make sure you take it during or right after your period.. But maybe she can give you different advice. I would wait for it to kick in before having unprotected sex, just to be safe.
As for the side effects.. The first 6 months can be a pain and many don't wait it out long enough. I bled a lot during the first 6 months.. But after I took the 3rd shot (and I just recently took my 4th) I haven't had but one light period since!! So don't give up on it in the beginning because it can be worth it in the end. I had just as much dryness on the pill then I do now.