What if ur period came on the 6 of last month but didnt come on the 6 of this month what could that mean?

Answers:

There are 13 28 daytime lunar cycles contained by a year - we freshly condensed it into 12 months of unequal length. Also the womanly cycle is different for respectively woman. Yours may be 30 days long or 25 days long or anywhere to be precise standard for you - so the fortune of it starting on indistinguishable date respectively month is slim.

5-6 months unpaid on length, Any accepted wisdom on what it could imply?

It may not be anything! You should hang around, I'd vote going on for 5 days to see if it comes...
All woman are different. The younger you are, the more irregular your period may be!! When I be 12, I never have a regular length, the first year, I missed my interval for 4 months.
Birth control can assist your length be more regular:)

If you're have sex, here's other that unpredictability of self pregnant if you're deferred, but single you know that!! Take a testing if you assume at hand's a randomness to be sure after waiting a few weeks!!