Ppl plz come and help !!!!will that cause problems in pregnancy?

i am pregnant now in 5 weeks..i used to be fit but i have been lazy for like 9 months and my bellyis a little out im so depressed bcoz i see every one who is ttc very fit and they dont have any fat..im 73 kgs and 1.68m...and i dont want to gain over 6 or 7kilo's i dont want to get depressed during pregnancy