I feel lightheaded a lot i can heartbeat in my stomach certain smells make me sick lower back hurts sometimes am pregnant?

It is possible that you may be pregnant, as some of the symptoms you have described are common during pregnancy. However, it is important to note that these symptoms can also be caused by a variety of other factors, such as illness or underlying medical conditions. To determine if you are pregnant, it is recommended that you take a pregnancy test or consult with a healthcare professional for further evaluation. They will be able to determine if you are indeed pregnant and provide appropriate medical advice and care.