7wks An 4 Days

I am 18 yrs old an I am 7 wks an 4 days pregnant. I went to a clinic to have all my prenatal care done and the clinic told me that I have to talk to one of their nurses then a social worker before I can be seen an evauated by a docor. I was wondering if this is normal protocall or if this clinic is just not one of good choice.
My other problem is how do I tell my mother that I am pregnant? My mom dispises my boyfriend....Y I dnt know they haven't even met because she refuses to. My boyfriend has been very supportive since we found out. I love my mom but I hate to think I would have to choose between the two.