hi redlady!

i think that the presence of EWCM is a good sign...have you tried with ovulation tests to see if you are Ovulating? you can get a maybebaby (they cost a little bit though..think around $80) and it is a kit that you can use over and over again to check when you ovulate. it is good to use alongside FF as sometimes (i have found) it doesnt always detect O. for example, i have a late ovulation and it never picks it up...
and yeah, the shift work that you have done in the past would have no doubt played havoc with your temp readings. i guess you will get a clearer picture once you have had a cycle or two at the desk job.

HTH!