Low blood pressure

Ok has anyone else had this problem during pregnancy? I work as a personal trainer and yesterday morning I almost fainted on the gym floor! So embarrassing. I am 18 weeks and I thought all these symptoms would go away at this point? Well I checked my blood pressure and it was 89/52 and 85bpm. I know that is considered low, but is it dangerous for the baby? I am still feeling weak today. I don't know what to do. I called the dr office and they never called me back. 😒