thanks everyone for your input it really helps
Minniemouse you may want to make an appt with your OBGYN if you are late and still experiening symptoms. I understand how frustrating this can be but you really need to relax and try to set your mind on other things until you know for sure.
It could be stress, but then again it's not uncommon to be pregnant and still get negatives on home pregnancy tests. Your best option now since you are a week late is make an appt for a beta blood test. That will give you an accurate yes or no. You can also wait it out and retest in a few more days. I hope all goes well:)
wel if im honest theres not alot i know as im only 16 but if you want my opinion wait for a week or 2 then go to the doctors if you still havnt came on, your sister may be right it could just be stress, just dont go thinkin of the worst it happens to alot of people :)