Now if they were to clear me if I visit them the next few days, you saying I don't need to take a covid test the day before I leave then?
Exactly. A Positive COVID test + Doctor's note clearing you to fly is valid for 90 days after the original positive test. Glad to hear your positive test was from a while ago.
If I purchase a jetbliue blue fare... is that good enough to cancel and rebook my flight then?
Exactly. No point in buying Travel Insurance.
I am returning back to the US. I am not like going back to Mexico now
Yep, the testing requirement to come back can be waived by the doctors note + positive test
https://www.cdc.gov/coronavirus/2019...travelers.html