FertilityZone

Well I'm miraculously pregnant against a long list of odds (including the fact I had knee surgery 3 weeks ago!), been trying for 5 years and diagnosed with unexplained infertility possibly egg quality. Today I am 6 weeks (which means I have just passed the time when I miscarried my egg donation IVF last year) and have several good pregnancy symptoms :-) So far so good.
My question to you all is that I am diagnosed with bradycardia (or brachycardia) with sinus rythym and an extra beat, I've had every heart test available and there is nothing wrong with my heart, it just has this particular heartbeat. Is this a problem for a pregnant woman though?
I've read that the mothers heartrate increases by 10-15 beats when pregnant but when I was monitored for my surgery (I was unknowingly 3 weeks pregnant then) my heartbeat was 40. Well I haven't lost the pregnancy yet obviously, but I'm concerned that I may do. My GP says there is nothing for me to worry about and I may just be one of those women who faints during her pregnancy, but I just need some more reassurance I think.
Due to my surgery I am currently at home resting which is benefitting my pregnancy I think, but does anyone else out there have a similar situation?
I've also learnt that my heartrate drops when I become anxious/panic. I used to think I was having a panic attack but actually the symptoms are identical to a dropped heartrate (the lowest it has been recorded was 29). When I return to work I am fully aware that I will have to avoid stress at all costs, which is easier said than done, so again if anyone can give me help on handling this I would be everso grateful.
We have long given up on having a biological child of our own so this is such a miracle I just can't lose it.
Many thanks everyone xxxx