Feel like a awful person

Got a bfp yesterday and I'm a pack a day smoker plus dip like half a can I only smoked 4 yesterday and one and a half today no dip at all I'm trying so hard not to but I get to the point I'm like shaky and anxious and my body's used to so much nicotine I can't handle it im4/5 weeks and freaking out and feel guilty is there a easier way to quit I don't want to harm this poor innocent baby!