Please tell me. 24 weeks pregnant. Woke up in the morning and coughed up…

Please tell me. 24 weeks pregnant. Woke up in the morning and coughed up blood with mucus. There's a sore throat. I didn't cough. I wasn't sick at that time. What should I do? Called my therapist, she says it's just a vessel burst, but online it says you need to take urgent measures.