Is it advisable to loose weight in your pregnancy.

Suneta

I am 5ft and 62 kg ...before a month ago I was 55...but in this month I didn't care of diet and exercise..thought will reduce over weight in next month..but now I came to know that I am pregnant...and I don't like to gain weight after 62 ..I was thinking that after being 55 I will work on pregnancy..now what should I do..can I still take healthy diet and loose weight or go with the flow.