Same BBT 3 mornings in a row... is that a sign?

Brielle • 26. Engaged. RN. BOY mom 8/31/20🤴🏽🍃🐘

Yes I use a correct BBT thermometer and I’ve tried taking it at a different times of day... the temp does change but the last 3 mornings at 5a has been 98.34. Is that normal?