Hello Everybody, Im looking for some advice on pregnancy. Here is my situation;

My girlfriend and me are in an odd predicament (at least it feels that way for us since we are young) she hasnt had her period at the very least 8-12 weeks. Over the course of that time we have used the Plan B at least once, we have also used two pregancy tests which came out as negative. But Im still very worried because she has been admitting some very clear signs of pregnancy (or Im being paranoid) she is ussually pretty tired and sleeps about 8-12 hours a day, she told me that she has been feeling rumbles in her stomach, and she often times expresses how sick she feels.

Im lost and I need help I dont know who to reach out too. Im really sorry if I come off as naive, ignorant, or stupid.

Here are my two questions;

A) Is a pregnancy test still accurate even weeks after the missed period? Or should you be testing everymorning after a missed pregnancy weeks later?

B) Is there any 100% sure fire way we can find out the status on this? Is there anything a doctor can use like a sonogram to find out right away?

Thank you so much for your support youd be helping a kid out so much thanks!