Testing for pregnancy

So I have been trying to conceive for a little over a month now. The first 2 months I felt like I psyched myself into having actual pregnancy symptoms because I was so excited.

Long story short I am 5 days late. Sick to my stomach quite frequently. Tested today and got a NEG. Anyone else have that pregnancy feeling, tested negative but then ended up being pregnant?

Ive heard some people say it took them until a week late to get a positive.

Im just hoping for pregnancy, but also hoping something else isnt majorly wrong to make me tired, nauseous etc.

** Obviously if this continues I will seek medical advice. Just wanted peers experiences

Help!