So scared 😢

Hi. I'm 5'7" and when I was in high school I was about 165 lbs by the time I graduated (around 140 as a fresh-soph). When I was in college I gained a lot of weight. By the time I graduated I was 235 lbs. I got engaged and before my wedding I got down to 185 lbs in about 10 months from the help of a doctor who prescribed me some meds and also healthy eating and better portions. It helped me learn a healthier habit and I didn't take the meds for a long time and kept the weight off plus kept losing very easily. I thought I finally made my lifestyle change. Flash forward and after our wedding it was our honeymoon, then thanksgiving, Christmas, a crazy busy season at our business (we are self employed) causing us to work 18 hour days for months at a time and live off gas station food and unhealthy eating habits due to convenience. I fell off the wagon HARD and gained all my weight back in a year 😢 my husband and I are now ttc and for the first time ever since I was a little girl who just started menstruation I missed my period! Which should be great news but I'm getting all negative tests now at 6 days late. I know that it may just be too early to get an accurate result but my anxiety is kicking in and I'm thinking what if I'm too heavy and my period just decided to stop? I'm so scared I'm too big to conceive and I'm freaking out 😩 can anyone help ease my mind? Or let me know similar experiences? Thank you