Shorter cycles...

My last 2 cycles have been a little off...last month my period came 2 days earlier than normal (not too crazy) and just now 4 days earlier than that (only 3 weeks between periods). I just went off birth control around 6 months ago after being on it for 12 years, so maybe this is my body still adjusting to not having it... But reading things about shorter cycles being a possible indicator of menopause nearing has me freaking out as I'm only 30 :( anyone else have this experience and still able to get pregnant?? Did your cycles go back to normal??