Dont know why i feel this way...

So im overweight, 5'2 and weighed 245lbs before i found out i was pregnant(5 weeks, sudden and unplanned with my husband of 2 years) i had actually been working hard to lose weight and had lost 30 lbs before i got pregnant so i was at an all time high of 275 before. Im now 17 weeks and have gained 5lbs back. Ive been eating healthy still, only water to drink, and walking daily but somehow i still feel bad..