Smoking while pregnant?

I’m a previous smoker, quit officially around 15 weeks pregnant as I cut back and completely quit. I did keep one pack of cigarettes for days where I just simply can’t handle life. I’ve had the same pack since then, & I’m now 32 weeks pregnant. I had it stashed away, hiding from my SO. Lastnight the found it. I feel horrible. I think he thinks I’ve been smoking this whole time and that’s not the case at all. I have one here and there and there was probably 10 cigarettes left. So I’ve smoked about 11 cigarettes in the last 17 weeks. I KNOW smoking while pregnant is bad, but some days it’s my only stress relief.

I feel disgusting & awful for not telling my so and him finding it, but at the same time it’s been so hard to completely quit.