First pregnancy

Hi ladies, i am pretty new to this group. I just found out this morning by blood test that i am pregnant. My doctor told me to take prenatals vitamin and vitamin d3 additionally. When i checked the supplements in prenatal it contains 1000IU vitamin d3 and the additional vitamin d3 which i am taking is 2000IU. So that means that i am taking 3000IU vitamin d3. I am concerned that is it a lot to take? How much d3 should pregnant women take?

Also any dos and donts in the first trimester will be recommended.

Thanks in advance