Late period, negative result on monday :(?

my period is going on 2 weeks late. at about 1 week late i had a tiny bit of light red bleeding when i woke up (breakthrough?) , which turned into brown and faded away in about 3 days. ive had cramping, bloating and a couple of times where i felt nauseous and a headache here and there. my husband and i are trying to conceive. aside from going in for a blood test, does anyone have any thoughts or ideas on whether i am or not and whats going on with the negative test result on monday. slightly discouraged