Why?!!! ☹️😭😔

I am 27 weeks and my baby is measuring at 25 weeks! 😔 last months appointment they told me her head was a bit smaller than it should of been, today they told me she got smaller due to my BP which causing her to grow .. she is almost 2 pounds which she should be more as I was told and when she is born she will be small not weighing as any other baby 7-8 pounds! This is really scary and I just want for her to be healthy !