can I go to normal doctors office??

I'm about to be 16 in January and I found out I was pregnant a few days ago... predicting from my last period (October 17) I'm 5 weeks... my sister who is 22 recently was pregnant and had her baby a few months ago and she went to women's care that was located in the hospital (in the same office park) and I was wondering if I can go to the same place or will they not accept me since I'm not 18 and older?  My mom would be with me.