Nervous!!

Karen
Hi Everyone!
My husband and I started ttc in September and shortly afterward found out I may have a fertility issue. Then, to our great surprise we found out I was pregnant in November. We were so excited!  Unfortunately I miscarried and the doctor advised it may be due to the potential fertility issue and I was referred for testing. I was crushed. On Saturday I found out I'm pregnant again!  But I'm scared to be excited. I'm still in the process of being tested for fertility problems and actually have an ultrasound on Thursday to check for problems with my uterus.  I should get results of blood work on Thursday as well and am anxious to see hcg levels. 
I'm hoping the ultrasound and bloodwork show no problems and I'll relax a little but I don't know if I'll ever shake the fear of another miscarriage. I'm scared to share the news with anyone because I don't want them to be excited in case I have another miscarriage. Anyone out there relate or been through something similar?