You stated that you aren't talking about your basal body temp, so no. Taking your temp at random times during the day isn't going to tell you if you're pregnant.
it is very possible! It's pretty amazing what happends to your body when you are pregnanct. Things you would never of expect.....my gf lost her eye sight. Thank goodness it returned post partum.
Just be sure to check with your doctor to be sure it is nothing else.
Good luck!