Is a hormone replacement therapy pill the same as a birth control pill?

I went to an OBGYN a few weeks ago for birth control. I said that I was looking for birth control to regulate my period and to help maybe clear up my acne. I also made it pretty clear that sometime in the near future I might become ually active which the birth control would also benefit me obviously. She said that Yaz would be my best bet with wanting to clear up my skin. She told me all about it and gave me papers for Yaz and everything. Turns out my insurance would only cover a generic version. So she called and said she is going to put me on Angeliq. I've never heard of it before but it was much cheaper and she said it was just as effective for my skin and to help regulate my periods. I've been on it for ... well today will be my 5th day (Got my period Friday and started taking it that day.) I decided to google the pill and read some reviews on it. I went to their website and turns out it's a menopause pill? I'm only 18. Also on the website it states "Do not use if you are pregnant. Use an effective form of birth control, and tell your doctor if you become pregnant during treatment." Looking farther into it, turns out it's considered a HRT pill. Is a HRT and BCP the same thing. So say after taking the pill for a month (the doctor said to wait a month while on the pill before coming active just to be safe.) I have , will it still prevent pregnancy or no? I'm so confused.