I'm sorry for your miscarriage, I know how it can make your next pregnancy quite worrisome. Many women have spotting though and go on to have successful pregnancies. It does not mean you are miscarrying for sure.
However, I would call your doctor right away and see if you need to go in. If it is heavy, red or persistent, he/she may be concerned.
what color is the spotting. i have heard many women spot early in pregnancy, as long as it is not bright red, clotty or persistent,
you can always call the doctor just in case.
How do you feel? Are you cramping? I have had two miscarriages so far and I, also, am pregnant. I am about 4 weeks and a nervous wreck. Hopefully it is not a miscarriage but, I would contact your doctor just in case. I can tell you that some women do bleed during their pregnancy but since you have already had one miscarriage I think I would contact my doc if I were you. It is better to be safe...
Good Luck and keep us updated....SSBD...