you don't even have to have an injection. Ask your doc about Cerazette (or I think the 'non brand/medical' name for it is Desogestrel). It's the same in tablet form (and the pills are sooo tiny. But talk to your doc about it... my body tried to fight agsinst it too... I bled and was in pain for a good couple of months and then on snd off for few more months. But, it did eventually settle and it's made such a difference. I was a huge mess before.