Soft spot

My son has his six month check up today and when checking his soft spot the doctor asked me if it was always a little bulgy I said I wasn’t sure because I hadn’t honestly noticed. She called in the more experienced doctor who owns the practice to check it out he said it was fine. This is my second child and I never had this worry with my firsf. Can anyone relate and give me advice because even tho the doctor said it was fine and nothing to worry about it’s all I can do. Google isn’t helpful either.