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

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.