Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
A warm welcome to the Community @nbrino1. If your tracker is not longer registering your sleep, I recommend restarting your Blaze and test it. In the meantime, keep in mind that you can manually log your sleep by doing the following from a computer:
1. Sign into your Fitbit Dashboard, then click "Log Activity", then select the "Sleep" tab.
2. Enter the time that you entered your bed and left your bed. Use the "previous day" drop-down option if you went to bed before midnight. Select the "same day" option if you went to bed after midnight.
3. You have the option to choose "12 hr" if you want to enter your time in AM/PM format, or "24 hr" if you prefer Military Time.
4. Once you sync your tracker your sleep information will be visible on your Dashboard.
Let me know the outcome. 
Best Answer