how long until my lungs go back to normal?

My parents, my mom and stepdad have always smoked in there house & I had no choice but to be around it. I was about 9 or 10 when they got there place and got married, they decided they’d be smoking indoors for they’re own convience. My best interest was not taken into consideration I’ve always had bad allergies and I have asthma when I was little & prior to the smoking inside my doctor told me he recommended me using a humidifier/ air purifier because of my issues. They smoke 1-2 packs a day, for years almost a decade my clothes my things everything has reeked of cigerate smoke. When I would visit family members they would always comment on how I smelled like smoke, classmates would talk about it to and make me feel like absolute garbage, doctors as well would bring up if I smoked and my old OB doctor even said they could smell it on me and she just shook her head. All my life I’ve wanted to do things such as dance and track but I havent been able to because I get so easily winded & so easily worn out. I also have issues with being outdoors in the heat because it’s hard for me to breathe. I’m 18 and pregnant with my first baby. They still continued smoking around me my whole pregnancy. This bothered me a lot as I’ve had a missed miscarriage before and I didn’t wanna risk anything going wrong with this pregnancy, I asked and begged them to atleast limit the smoking to their bedroom and to please start going outdoors to smoke but they didn’t listen to me, they’ve had months. All of my baby’s things smelled like cigerate smoke I broke down and cried. Baby’s are suppose to smell wonderful. I’m 35 weeks pregnant & I realized things needed to change I didn’t want my newborn to have to be around that I had to do what I could to give him the healthiest lifestyle I want him to be able to be in sports and healthy. Anyway I’ve moved out and gotten my own place. I’m so happy. Will I always have breathing issues ? Have my parents secondhand smoke affected me long term?