Am i pregnant if i hav +urine test but no sac in us.uterus lining is thick.i had4 abortion and 3 live birth.lmp on7/7/13?

You are pregnant,: But it may not be a normal pregnancy. You need to see your doctor for continued monitoring with blood work and ultrasound.

U need a blood preg: Test as u may have had an early spont ab or incomplete ab and need to make sure u do not have an ectopic the doc who did your us should have explained all of that to you, please see your gyn asap.