Weight gain and exercise question

How much weight have you gained so far? I'm 22w1d and have gained 15 lbs. I've used a pregnancy wright gain calculator that says I am 1lb over the recommended weight gain for this week. Don't get me wrong - I'm not freaking out over my weight and I know everyone's body is different. I try to eat healthy but crave sweets like crazy so it's hard! I also have a back injury and the pain has intensified with pregnancy so it's hard to work out. And to be honest, I'm exhausted by the time I get home from work! Anyone else like me?