Many symptoms of early pregnancy are very similar to PMS symptoms. You can have swelling in your breasts, crampy feelings in your abdomen, feeling tired, and nauseous. One that's different is in increased sense of smell. You may notice that foods you smell all the time suddenly seem stronger, and may make you nauseated. Of course the most obvious symptom of pregnancy is missing your period. If/when you miss your period, get a home pregnancy test. :)
Many symptoms already mentioned above. The one is a feeling inside your body, the movements of foetus, it is just like if you catch a sparrow in your palm. A feeling like that in your pelvis or baby sac. You can feel body movements and kicking. It is a great experience. Best of luck and be a proud mother.