How I've lost a stone whilst pregnant

No I didn't cut off an arm. I started slimming world online when I was 5 weeks gone and lost 8lbs in about 2 weeks then found out at 7 weeks and started to feel pants so only ate a little bit just enough to look after baby. Then I had sickness for two weeks and now I try to eat healthily and get all the vitamins I need but must admit I eat out and have had a few takeaways recently but still not gaining! Will start back on a pregnancy friendly version of slimming world to maintain my weight and eat as healthily as I can as soon as I'm done resting! That's my secret lol!