I think u should go and see a gyn/obst doc soon, they might do the necessary tests and see what is wrong. Becoz sometimes, a doc's opinion is very useful.
Elevated temp after ovulation is usually a pregnancy.
Coming off the birth pills, did u have a normal period like 3-5 proper periods........ 28-35 days cycle???
Using the opt, is it a good source? Any problem with the test? Becoz u cannot be ovulating for so many days, I think.
So the best is to check with not a family doc, but a gyn who is well versed in this things...
Take care.