Ok so i had an transvaginal ultrasound scan i was about 4-5 weeks pregnant and they said they couldnt see anything but that is probably because its to early, ive been doing pregnancy tests everyday since i found out i was pregnant due to me having 7 miscariages one on the 4th may and i fell pregnant right after it so im a bag a nerves but all the lines on the tests are getting darker and i dont have any pains or bleeding etc it feels like my pregnancy with my son but i cant help but worry, so is it normall for them to not see anything that early on?