BBT/headaches/constipation

Nichole
Hi. My name is Nichole and I've been tracking my bbt. What does the temperature look like if you're pregnant?  My af is due Friday but I noticed my temperature has been high for the past few days. I also have had slight headache/migraines this week as well. I've been constipated mostly this week in rope if peeing a lot. Are these early symptoms?