what temp should i use?

Jessica

So I went to bed at 10, woke up at 1 and took my temp....I usually take my temp at 5 am so I used a BBT converter and got 98.84 (I was afraid I was going to have trouble falling back to sleep, but I did go right to sleep and woke up at 4am.... I checked my temp just to see and used the converter and I got 98.46...... 

What one should I use .... i got 4 hours of sleep with both...... help!!!!