Use a BBT (Basal Body Thermometer) every morning BEFORE YOU MOVE. Literally, you should ONLY move your arm slightly to pick up the thermometer. You should also have been sleeping for at least 3 straight hours (no getting up to pee).
Track your temp everyday and look for averages. Nobody can tell you what is *normal* for everyone. Some people run hot, some run cold. Can have to do with thyroid, but some people are just warmer/colder natured.
But if you track your normal temps, then you can tell if thyroid is slowing (colder than normal temps). You have to track the pattern of your cycle - not a few temps here and there.
My normal temps have ALWAYS (even pre-hypothyroid) been lower. Even when normal and on synthroid, my temps are in the upper 97s. Anytime my temp is in upper 98s nearing 99, I have a fever - aches, chills, etc.
Your temps are lower pre-ovulation and higher post-ovulation. Temps may rise slowly or quickly - it can also rise and fall slightly over several days. USUALLY you will see a dip in temp around ovulation, then a rise when ovulation has occurred and egg is dead. Temp normally stays high during your period. When period if over, temp will likely drop back down a little.