Temps in the higher 97s, is there still a chance?

Maddy • 31 • Married to the love of my life • Mom of 2 boys • Pregnant with boy #3

I’ve noticed most pregnancy charts have a waking temp in the 98s...it is possible to still be pregnant but it only stay in the high 97s? Getting discouraged :( I sleep with my mouth open also, don’t know how much that affects it, any advice/opinions appreciated!