Thank you for sharing your story! You are right - it is very unlikely that the morning after pill could harm a fetus. Because EC simply alters the environment of the uterus, making it undesirable/impossible for an egg to implant, if the embryo has already embedded itself, the pill should have no adverse effects.
EC is NOT an abortion pill, so it will not dislodge a growing embryo from its space in the uterus's wall. The pill merely floods your body with a large amount of hormones. This is actually why the morning after pill is so time sensitive (best if taken within 36-72 hours of sperm exposure, depending on the brand) - it is a preventative measure, not a drug that will stop the formation of an already settled fetus.
Please feel free to write back with more of your own knowledge on the topic - I would love to hear more.