Talk to Gastroenterologist on Poor Digestion

Hello ! I am 34 years old male and I have been suffering from constipation for few years lately and in 2015 I started exercising and dieting to lose weight and I was successful in that but now it is really hard for me to lose weight despite having working out 6 days a week and being on a caloric diet. I feel whenever I give carbs to my body it doesn't handle it very well and I get bloated, gas it is very uncomfortable. I did ketogenic diet in past and in which I didn't face these issues except for constipation but losing weight was still a difficult task for me. Also, I have been facing continuous bathroom trips for urination late at night when I go to bed to sleep.