Healthy Food Chart

Please, read this in its entirety. I am not lacking knowledge by any means. I just think I am missing something and would love some advice to maybe jar my memory.

I am 41, 5’7 weigh 210 look like I’m only about 180. But, Im done with the body builder look, I want to lose weight and tone. I have tried everything. I think there is something wrong that I am not getting. I dont drink any soda, i drink water all day, cup of hot tea at bedtime(no sugar). I dont eat any bread,processed foods,candy and I actually dont like salt. I love spicy foods, take a multi vitamin every day. Do pilates 3 times a week, yoga twice a week. And walk the big doggies 3-5 times a week 3-5 miles every time. I am a very busy, active person. Only sleep maybe 6 hours a night and Im ok with that, hardly ever feel drained or tired. Do not drink any alcohol. Ride bicycle to grocery store and eat mainly fruits and vegetables and nuts. I do eat bison instead of hamburger. And I have a small stomache where I have to eat 4-5 small meals a day, large meals hurt me and will bloat me. I do take fiber daily too.

Not sure if Im forgeting something? Oh-Im sure I eat around 1200-1500 calories a day have kept a diary log-so now what?? I will lose 5 lbs, then gain 7 back? I have eaten this way for years-but it seems that Im actually gaining faster? I have to have something medically wrong? I have tested bloodsugar too just in case and Im pretty darn normal. Stay around 80-112. PLEASE SOMEONE-I beg anyone to show me the light. What am I doing wrong? Or what is wrong? I have had thyroid tested 6 times!! They just say normal levels?? I am so lost. Thank you!!