healthy or just gaining weight

Anja

So my current bf knows I lost a lot of weight just before we started dating about a month ago agp

Today he told me he could see I'm picking up weight faster than he thought (picked up 6 kg in the last 3 weeks)

Idk if it's normal to pick up weight this fast and how can I quickly lose weight without working out since I am too busy with school and personal issues at home