Hello. I am currently at 6 days after my embryo transfer and 13 days after the hcg trigger shot. Since 2 days ago, I have been getting a faint positive line on First Response tests and the lines are getting a little darker everyday. My blood test with my doctor is only in 3 days. I've seen a lot of women say the hcg from the trigger shot was out of their system in about 10 days. I had the trigger shot 13 days ago. Could I be pregnant???