If you are pregnant and have not had medical care, depending on your lifestyle, there is a possibilty that you could put the baby at risk, for instance if you abused drugs and/or alcohol
this could cause damage to a developing fetus .
Even certain prescription medications are harmful, as well as cigarette use.
I am not sure by your post if you are pregnant or think you are pregnant. Regardless i suggest you seek the care of a doctor right away.
If you are pregnant your baby could be fine, and you can start taking care of yourself from this point on.
Good luck to you.