Thank you for your ultrasound
As your pregnancy
test is positive, it is not too early for an ultrasound to confirm an intra uterine pregnancy.
Of course, it is too early to visualize fetal development, but you will definitely know if the pregnancy is intra uterine or tubal.
Also, an ultrasound is preferable to a blood test
, because blood tests will require serial testing, unlike a single one time ultrasound.
Moreover, I fail to understand why you are so apprehensive about a tubal pregnancy.
Minor pain and discomfort is common in early pregnancy, and increased symptoms might point to an impending miscarriage
of a normal intra uterine pregnancy.
Please visit your gynecologist for further steps.