Temping question

Hi ladies!  This is my first cycle TTC since an ectopic at the end of October.  I'm doing opk and planned to do temping too.  I just got my basal thermometer, but I already got my positive opk ( positive 2days ago and this morning too, negative this evening).  I'm wondering if I should go ahead and start charting my temps, or if that would be too confusing??  Should I wait until next cycle if I don't get pregnant this month?  I'm not even sure when to start bc I never did this with my first.  Thanks a lot in advance!!!!