The only definitive way to know if you have COVID-19 is by getting tested. If you cannot get tested, you should assume you are a carrier if you have had direct contact with a confirmed COVID-19 patient and you should self-quarantine for 14 days after direct contact.

https://wwwnc.cdc.gov/eid/article/26/6/20-0412_article

Drafted 20 March 2020