Weight gain - what has your experience been?

Rita • 34 years old, married for 2 years, TTC for 17 months, pregnant for the first time! Due February 2017.
Hi everyone! So I had my monthly check up yesterday at 17 weeks pregnant and I've already gained 17 pounds! My midwife is not really worried but I am a bit! I definetely have been eating well (usaully am a casual calorie tracker) but haven't had any crazy eating sessions or intense cravings for sweets or junk food. 
How has your experience been with weight gain? Does it often rapidly pick up towards the second half of pregnancy or stay consistent? Love to hear about your status or past experience. Much love to all the mamas and mamas to be out there 😘