Madam, hearty congratulations. Now you are pregnant, you need to pick up patience. It is normal to loose bit of weight because of nausea
and hence poor eating. Your doctor will tell you about diet and your weight will increase. Your doctor will also advice you an USG which will rule out any pathology , if any, do not overlook regular doctors visit. By 4th month of pregnancy
, you will notice abdominal size but others will be able to notice it by end of 5th month.
Best luck and enjoy your pregnancy.