Scared

ohlan • 2misscarriages👼🏼👼🏼, my 🌈👶🏽 son and my daughter.
So I'm about 4 weeks and 3days pregnant with my first child but today I noticed some brownish spotting and some light cramping but as the day has went on the color has been getting lighter. so I went to the ER and they said that my HCG level was at a 507. I know that's low and I'm freaking out, I need advice......anybody.