About a week or so before my period starts, during my period and sometimes a few days after ,i run a temperature that ranges 99 - 100. thoughts?

Normal: Those temperatures are well within normal limits. Normal people's temperature fluctuates like heart rate, there isn't "one" normal temperature. Depending on activity and the ambient temperature (in summer it's warm) anything up to 100.4 is normal.

Depends: Our body temperature naturally fluctuates. Women can also notice changes in their body temperature with ovulation. As long as your temperature is below 100 and you have no symptoms of illness, such as cough, runny nose or burning with urination, I would not be concerned. If you feel ill however, that's different and should be checked out.

No worries: Because of ovulation a woman's basal body temperature (BBT) increases one-half to one degree Fahrenheit (one-quarter to one-half degree Celsius). So your temperature change does not appear to be out of line, unless it rises above 100. If your plan is to record your BBT, then you want to use a thermometer specially made for that purpose. Hope that helps.

It's normal: This is a normal component of the menstrual cycle. The luteal phase, which is when ovulation occurs, is triggered by a surge in leutinizing hormone (LH) and estradiol. This occurs roughly 21 days into the cycle and ends with onset of menstrual bleeding. The temperature increase marks the start of this phase, and is the basis of the "rhythm method" of contraception.