I am 49 years old and have been on Bioidenticle Hormone Therapy for about 4 years now. I have not had a period for 10 months now. I have been experiencing dizzy spells and nausia for about a month now. 3 weeks ago I took a HPT and it was negative. I still have slight symptoms but now my breasts are getting fuller and my lower abdomen is pouching out and firm. Is it possible that I'm pregnant and is there a risk if I am, since I'm on HRT?