Weight Loss, Blighted Ovum, BC

A short intro- I'm married, 2 beautiful little girls (7 and 2), with 2 miscarriages. i deal with PCOS and Endometriosis, with past infertility and I've gotten pregnant while on birth control. My husband deployed a couple of months after I began a new diet. I had only lost maybe 10 to 20 lbs before he left (it varied 10 lbs because of driving across country several times). When I got back to my family's after he had left, I settled in to my new way of eating. While he was gone, I lost 60 lbs and my cycles regulated. I also ran into a host of issues. I got appendicitis, had it removed, Dr. found a large hernia during that surgery. My surgeon repaired the hernia which ended up being 10 cm and it involved taking my entire belly button. He also removed my pannus while at it. I came out looking and feeling like a different person. I'm still so happy with the results. Fast forward to my husband's homecoming. We were able to get A LOT closer than before, and it resulted in a pregnancy. We had dark positives and so many signs that pointed to possible twins, so when I had my first appt and ultrasound at 8 weeks 5 days and was told they couldn't locate baby; it was devastating. I was faced with choosing to either try again, even though we didn't truly try in the first place, or continue Weight loss and get to a better weight to get pregnant later. My youngest will be 3 in NOV and I am focused on weight loss still, I just can't stop feeling like I'll end up pregnant while on birth control again. My doctor claimed that in the past maybe the dose wasn't high enough to compensate for my weight. I'm just nervous, maybe because the miscarriage is still so raw, but I don't feel comfortable with the idea of being pregnant again so soon. Has anyone had experiences were they lost weight, had normal cycles again, and birth control was effective? Pictures of my babies, the tests, and My weight loss.