Pregnancy weight

I’m currently 20 weeks and have since put on abt 7-8kg. :( Is this ok? I checked the pregnancy calculator and I’m ard 1kg over the limit. I’ve been gaining weight ever since I hit my 2nd trimester. An avg of 1.5-2kg a month. I’m just abit worried I’ll be overweight by my 3rd trimester. Anyone gained more than 15kg in total?