23 weeks and gaining a ton of weight

sam

so I'm 23 weeks pregnant and have already gained 24 lbs! I exercise for an HR every day and eat VERY healthy!! what am I missing /doing wrong?! I am so frustrated that I work so hard to stay fit and healthy and I am still gaining a ton and just feel like I'm out of control... I gained 50 lbs with my other preganacies but I wasn't working out and eating as good as I should have been. I thought this time would be different with me working so hard...but no... am I just going to gain 50 lbs when I'm pregnant no matter what I do?! anyone have any other tips or tricks to keep the weight off?! I'm Soo discouraged!!