Yes is normal to feel ur heart beat in your stomach..
Hello,
It is normal, if you are a thin person, to be able to palpate your pulse with deep palpation of your abdomen. If you don't have any family history of aneurysms and don't have a connective tissue disorder like ehler-danlos or Marfans, it is very unlikely to have an aneurysm at such a young age. We always recommend discussing these things with your doctor if you are concerned, but, in general, what you are describing is most likely normal.