weight gain

i really love orange theory. like the hour i go a day is everything to me and my mental health. ive been going 3-5 times a week since september with january and feb more like 4-5x a week. i have gained almost 10lbs and my pants are TIGHTER. im also seeing more fat in my belly and hips area. i havent increased calories either.

i know this could be cortisol and i really dont want to lose my hour of sanity every day. is there anything i can do to not gain weight and to lose this cortisol belly without stopping orange theory or lessening classes?

thank you in advance.