Your temperature goes up post ovulation, so it would seem more likely to feel too warm. But on the other hand, pregnancy is such a mysterious thing it could be within the realm of possibility for a particular woman to feel chills, I guess.
Just to let you know, thyroid issues can be elusive. They don’t always show up in blood work and many doctors are CLUELESS about the lab values and what hypothyroidism is all about.
If you didn’t have a FULL thyroid panel run, you need to IMMEDIATELY. And, then, get a copy of your labs and run straight to the ‘net. There are a number of thyroid advocacy sites out there that are excellent and will tell you all that the docs won’t.