My cycle is roughly the same as you.
I charted for a year before actually trying and I concluded that I was safe for about four or five days after the period and then I would be going into the more fertile time, so time to use condoms.
However on our honeymoon in may it was time to reverse this and make sure that we had sex during this fertile time. For me I decided that if we waited for about five days after my period and then started having sex most days after that until my temperature went up then it would be the right time, it worked!
If in doubt, get the 'taking charge of your fertility book' and it tells you everything you need to know
hope this helps