HELP!

Hey guys I really need an advice. But please no judgement. The situation is I tested positive for COVID a month ago, it was just mild symptoms and I recovered. But two days ago I developed a bad sore throat, at first I was not worried about it, I read that it can normal during pregnancy due to our immune system. Before pregnancy I barely got sick, well this time the phlegm is so thick, I never experienced that before. It’s hard to sleep. I have been thinking about re testing got Covid but I heard you can test positive for 3 months after having it, so I’m not sure if I even should. The thing is I am worried for me, for baby. I have a doctors appointment with OBGYN today at 3 pm but I don’t know if I should cancelled it because I’m sick, even tho I haven’t been there since last month, and I just want to make sure everything is ok. I’m so overwhelmed 😭