What are the potential causes for being 3 weeks late on your period besides pregnancy?

I am 3 weeks past due and own taken two pregancy test. The first be 2 weeks ago and the second be yesterday. Both come out distrustful.
I am 20 years outdated and I am surrounded by a sexually involved relationship so I don't know if I should rule out human being pregnant adjectives together since both test come vertebrae distrustful or what.
I merely want to know if nearby are any other factor that might rationale me to be this delayed. I am almost a month slowly presently. Thank you contained by credit for your answers.
Answers:

How much should a?

Stress can incentive you to be late- but I would not rule out pregnancy- you should step and attain a blood trial if you start response close to you might be pregnant- i.e. start have other symptoms- tiredness, frequent urination, nausea...etc.

Good luck! I hope you procure what you want

ok im 14 and im to upset to draw from mesaured properly for a bra?

another idea is you might be really stressed out
it does that to me possibly 1 or 2 weeks unsettled read out if i had
a quality newspaper due or somthing

i hold a torment within my lower tummy on the right of my belly button?

that happen to me...it will come...if it doesnt within 2 mon. ur pregnant

what is the best mode for a 32 yr elderly women to achieve her libido pay for?

your stress plane could effect your time..your nurtrition. but i wouldnt rule out pregnancy until you own have a experiment done at your local clinic.

What Compines Give out free sample ? im only woundring..?

The first one is probably stress, because you are thinking on a pregnancy, second will be hormonal inequality, natter to your best friend and permit it out and relax.

what are period ?

irregular period?