You will likely see the gestational sac and maybe the yolk sac.
It is possible to see a uterine sac, called a pseudo sac, with an ectopic pregnancy, but most likely there will be nothing in the uterus.
You should be able to see the yolk sac at 5 weeks.
Sac spiders or Clubionidae live all over the world.
at about 4 weeks they can sometimes see the gestation sac. by 5 weeks they can usually see the yolk sac. and by 6 weeks you can usually see a fetal pole, sometimes even a heartbeat
From just over 5 weeks, see the associated website I had my first u/s done at less than five weeks I was probably 4.4 weeks, but all I showed was the yolk sac and the sac....no fetal pole or baby. == an internal ultrasound can detect a pregnancy much sooner than an external ultrasound, even if all it detects is a yolk sac.....there would not be a yolk sac if you were not pregnant.
Yes At this point you SHOULD see that.
Yes.
Yes, yellow sac spiders are found in all but the most northern states in the U.S.
Probably strep throat. See a doctor.
sac-like
The inner most membrane is the fluid filled amniotic sac, next is the yolk sac, where the first blood cell originates. The allantois forms near the yolk sac, while the chorion surrounds all the other ones.