BBT Averages

Quick question:

I experienced a stillbirth nearly a year ago at 34 weeks, and have been proactively trying to conceive for the past 6 months. I’ve done ovulation tests, but they NEVER register an LH surge...so I got a bbt thermometer, and have been using it the past week religiously. My morning temps have been averaging 98-99, and I should start my period tomorrow or the next day. Do these numbers sound right?? I’m 21, and have never done temp measurements before to monitor my cycle, and therefore have no idea what my numbers should be looking like...and google doesn’t help. Tips?? Thanks a million 💕