the first response test can be taken up to 5 days before a missed period. i never took one but i've heard it's not very reliable. it's best to wait until your period is due. if it's late wait 3-7 days and take the test. i know it's a long wait but....you'll get a more accurate result.
my "symptoms" started at about 4-6 weeks. i was nauseous, sleeping all the time, urinating ALL the time, food made me sick to my stomach so my cravings didn't start until my 2nd trimester and by 6 weeks i had my baby pouch (i had twins so a woman typically shows VERY early with multiples).
Theres a big big chance your pregnant hun
but no-one on here can say for definate "your pregnant" they will only say what ive said "theres a big chance"
you need to take a test when your next period is due
i live in england and here you can take a test 6 days before your period is due but i dont know if you can in america
its a good sign your mum didnt go mad tho!