The virus is still very elusive at this stage and as it is subject to mutations it’s quite hard to answer any of these questions definitively. You would only meet the criteria for testing at this stage if you had the symptoms (fever OR urti symptoms with or without fever) AND you have been travelling in the previous 14 days OR been in contact with anyone who has been diagnosed with COVID19 or is suspected of having it. I think it may also apply to health workers experiencing symptoms. I have seen people saying you are immune after having it but I’d take this with a gain of salt and would assume you may be partially immune but continue with standard pandemic hygiene practices and protection. The virus impacts people very differently, I’d say you’d be in a critical condition if you developed severe pneumonia as a result of the disease.