98.8 underarm body temperature

Anastasiia
Today's I just found out that I pregnant (to twat showed 2 faint lines), later today i measures my body temperature because I had hot flashes and it was 98.8 .. It still the same. I have a history of miscarriage (December 2014). I was so happy the whole day and now  I am worrying .. anybody had the same symptom?