Threatened miscarriage?

Jessica • Got a beautiful baby girl! & amazing boyfriend! Baby #2 due October 29th, 2020♥️ rainbow baby 🌈

I went to the hospital yesterday & kus my throat was hurting and my daughter was sick. I also said I had pain on my left side one day but it wasn’t bad. They found a cyst on my right ovary & told me my hcg level was at 243. They diagnosed me with a threatened miscarriage. I haven’t bled so I’m confused. I should be 5 weeks tomorrow. Anybody go thru the same thing? Am I worrying too much?