It is not uncommon to experience some bleeding during the first trimester of pregnancy. This can be caused by various factors such as implantation, hormonal changes, or even cervical irritation. While light spotting is generally considered normal, heavy bleeding accompanied by severe pain may indicate a potential problem and should be evaluated by a healthcare professional. As for the feeling of fullness in your stomach, this can also be a normal symptom as your uterus expands and puts pressure on your digestive system. However, if you are experiencing severe discomfort or persistent bloating, it is advisable to consult with your doctor to rule out any underlying issues. Remember that every pregnancy is unique, so it's always best to reach out to your healthcare provider for personalized advice and reassurance.