The only way to know if you would deliver naturally is to try , there is no better test to tell if your pelvis would allow a normal delivery than the babies head.
OK tHank u that makes me feel better about things
The width of your hips might matter, but generally no. My cousin is your height, weighed 90 pounds before (and after) her pregnancies, and both of her children were delivered naturally with no complications whatsoever. Congratulations on your pregnancy!