I did actually call my own Ob in town here, even though she isn't legally allowed to see me after 12 weeks, she kindly called back and listened to my concerns (about the heart beating in my head etc and lack of any response from the registrar at the clinic) and she said I should go for a full range of blood work to make sure all is ok and that I am not anemic as it can result in that symptom. so i finally feel like someone is at least checking me to make sure it is just 'one of those pregnancy things', and that there isnt anything else wrong. If all is normal, well then at least I know not to worry.