I'm really concerned about my situation. It's been about 15 days since I recovered from COVID-19, and now I'm dealing with shortness of breath, fatigue, anxiety, and occasional chest pain. Sometimes it even feels like there's a sharp, needle-like pain. I haven't had any investigations or tests done yet. Could you advise me on what I should do next and which type of doctor I should consult? I'm a bit worried and could really use your guidance.