I just found out I am pregnant!

I went to the doctor a week ago. I just found out I’m pregnant at 11 weeks. Now I should be 12 weeks pregnant. So, my friends said I have to keep walking and do something all day everyday. I tried to get myself to do something but I am tired all the time. Do I have to force myself to walk more, get some exercise? I did wash the dishes and vacuum around the house. Man, just today, I woke up and got some breakfast and took a shower, after that, I’m

So TIRED already and I don’t want to do any more duties for tonight but my friend said I have to go out for walking, get to bus, to the stores and come back home. Umm... what do you think? Do you have to walk a lot in first/second trimester of pregnancy?