Late maybe

I was on the pill for almost 16 years and had a very regular period.  I went off the pill in August and have had a 45 day cycle since.  I was due for my period on Friday.  I spotted a little two weeks ago, hoping it was implantation.  I began spotting again but very minimal and only when I wipe.  I am being treated by my gyno for hypothyroidism to try to regulate my period on a 28 day cycle.  I have an appointment with my gyno on Thursday.  Should I test?