Life after Depo Injections

Hi All, Can anyone share their knowledge or experience with me please.  

I came off the depo in August last year and I am really pleased to say my periods have returned, albeit 2 weeks and counting but I guess this is to be expected as I was on the depo for over 12 years and to be honest I am really pleased how quickly things returned to normal. However, my question is does this necessarily mean I can now get pregnant?  I thought having my periods back would mean everything is ok down there.

Also, I gained some weight whilst on the depo and was wondering if anyone knows if this weight will now slowly disappear...heres hoping eh!!

Thanks in advance.

Em