my last period was the 11th of march till the 16th of march. i had the implant in my arm for nearly 4 years and had it took out on the 20th. the implant only works for 3 years. so it was well over due. i had sex on the 21st,22rd and 23th of march. did i time it right and would all hormones be out of my body now? i only ask because for the last 3 days everytime i eat i feel sick or have been a little sick in my mouth( sorry i know it's gross) i just wondered if i could be pregnant? thank you