Hi every one

i found out on Monday that i was pregnant and after trying since Feb we were so excited to hear the great news - Due to the job i have i had to tell my employer that i was pregnant so not to endanger the pregnancy but since then every one at work knows and after having conversations with a few people i am really worried about miscarriage. I have had m/s for the last 3 weeks - not throwing up but just the feeling of nausea, my really sore b/b and niggley pains in my abdomen . When i went to the doctor he asked if my mother had m/c - that got me worried also as my mum had a couple, just wanting to know if a m/c was to occur at what stage is it mostly common? Is it normal to have these concerns?