First off Congrats on your pregnancy, with your working out check with your doctor
Generally while pregnant you can continue to do anything you did before your pregnancy. Just remember to take it easy with very high impact workout, Continue on with your cardio do what you feel comfortable with, keep well hydrated and as cool .
You can also continue to do weights work, as long as you don't lie on your back , but as the pregnancy progresses, you may find balance becomes an issue, so modify your workout to accommodate
Your own body is the best indicator go by what your body tells you. If you find something uncomfortable seek out an alternative.
But as i said above before doing any workout seek guidance from your doctor first