Four days after embryo transfer the estrogen level is 950. is this normal?

Not sure: Generally, nine days after an embryo transfer, you draw your blood for a HCG level. Most clinics do not measure estrogen. If the results are low, it is generally indicative that you may not be pregnant. At our clinic, even if the levels are low, we repeat them in 3-4 days, "just to be sure". Sometimes, but not often, low e2 or HCG levels can result in a good pregnancy. Good luck.