Feeling super insecure due to the crazy weight gain

Feeling insecure due to the crazy weight gain. I am at 30weeks now and I’ve gained about 13KG so far. I am in a mummies whatsapp chat and most said that they only gained like 4kg and some even hardly gained any weight. My gynae also mentioned that I’m gaining too much weight but honestly I do not know how to stop the weight gain. I’ve been eating healthily and my intake is still lesser than regular people. I do believe that it may be due to my restricted diet pre pregnancy hence the crazy weight gain when I start eating more during pregnancy.