Hi
Congratulations to you on your pregnancy!!
Regarding your Leaves, office, manager..dont think too much and Its more important for you to take proper care of yourself, as you mentioned you had spotting,which is not a good symtom in pregnancy, you need to be extra careful.Nausea is very common during early pregnancy and will go as you pregress second semester. you can consult your doctor who can prescribe you some medicine to control that.
find out the maternity policy with your HR and don't feel guilty about taking leaves. I hope People in ur office must be understanding and will co-operate,don't think too much.
any other worrys or problem you may have, do write in, my personal email id is
luckydove81@yahoo.com
take care
Lucky