lice, a breakup, pregnant and lost mom :()

My boyfriend of 5 months and I recently broke up, and last night I found out that I'm pregnant with his child! He broke up with me bc apparently I'm "not the same anymore" but my mother just passed away less than a year ago, and he was well aware of my situation ! Ugh, and on top of it all I have head lice, very very badly. But I'm scared to do any treatment bc idk if it will harm my baby. My house is a wreck bc I haven't had the motivation to do  anything, I want a cigar so bad right now but my baby will be hurt, I may still smoke half but idk I might, yeah. I just need help, anybody out there?!