New to BBT

💋🥀Angel👼🏾🙏🏽🤞🏽

Ok so I’m new to this whole BBT thing. I don’t know if it’s cook to check your temp in the afternoon or not but I just checked mine because I’m a week late as of today and when I checked it it said 98.0 what does that mean. I’m going to check it again in the morning. HELP PLEASE