I had two m/c's before having my beautiful DD. I know how upsetting and difficult it is to go on to have another pg. Don't feel selfish. You are going through a tough time and you have every right ot be asking questions and to be asking for reassurance.
I had early spotting and cramping early on in my pg with my dd and asked a very similar question here back then. I got lots of reassurance that you can go on to have another happy and healthy pg and baby. And I did, I now have my little girl as proof of that!
Be kind to yourself and take things easy.