I had an ultrasound at 5 wks 4 days from my last period. there was an empty sac measuring 4 wks 5 days. hcg 4850 & brown spotting. any hope?

Early pregnancy: Yes there is still hope. I assume this is your first visit for this pregnancy. At this point, I would consider it an early pregnancy. Likely your doctor will repeat and US in a couple of weeks. You should see a crown rump length and fetal heart tones by then if it's a normal pregnancy. Make sure not to take ibuprofen during pregnancy. I will keep my fingers crossed for you.