Im 9 weeks pregnant and i'v been smoking about 5 cigs a day but today i stopped.?

yesterday i smoked around 3 cigs im stressed and it calms me down but today i lit up a cig and the thought of hurting my baby after 2 drags i had to out it.. i had bad cramps last night i hope they was normal im not smoking anymore cigs no matter how tough it is.. i want an healthy baby and i wouldnt be able to live with myself if i misscaraged because i would put it down to me and my bad habbit. so no more do you think the smoking i have been doing as harmed my baby really bad?? im not smoking anymore iv quit