Day 125-Need Advice!!!!

Hello. I am new to this site. I figured I'd come here for some advice. I have been nicotine and coffee free for 125 days today. I actually quit because I found out I was pregnant, but I miscarried a few weeks later. I literally quit in one of the most stressful times of my life. I was pregnant and being evicted from my home of 6 years b/c my fiance had lost his job. I have two daughters and it was really hard on all of us. I am also in school full time. Last week, I told my dad that I had been quit for 120 days and he said to me, "You'll start back." I was shocked and said, "Daddy, why would you say that to me?" Since that day, I have had huge anxiety. Not that I WANT to smoke, because I absolutely do NOT crave for a cigarette, but I'm scared to death that I will start back and it scares me to think about it. I have been trying to breath through these episodes of obsessing over it. Theres like a voice in my head saying, yea right, you'll start back????? Has anyone ever dealt with this this late in the game? My pregnancy hormones are leveled out and I'm wondering if I was more comfortable due to the feel good hormones of being pregnant. Either way, I will NEVER take another puff, but I've been super anxious and scared that I will someday start back?! I don't know why my mind is even worried that far ahead. Its so weird. Any advice....shoot!