Late af 7 almost 8days, could i be pregnant??

So af is 7 days late i normally have a 26 day cycle. Yesterday i was having some white discharge so i put in a light tampon and when i took it out there was super tiny amount of blood on it but nothing after that. i have also had a urine and blood test done at 4 days late but both were negative. I just feel so different; have sore boobs, nausea and vomiting, pelvic pain off and on, lower abdominal tightness feeling, weird food craving, frequent urination, mood swings.