What Causes A Delayed Period,dizzy Spells And Bloating Of Stomach?

im 25 yrs old, 9 stone. Maybe you can help me. I am 6 days late for my period. This month I didnt take my microgynon 30 pills because I was ill with flu and barely showered nevermind remembering the pill! I was on two courses of anti biotics for the flu and chest infection. Anyways my partner and i had sex on 12th of this month. my last period was 26th april. i havent had my period since- i have white discharge, dizzy spells, bloated, really sore ovaries, feeling sick, headaches, my urine has been foggy at times. i have been to doctors and hospital to get a check up- they checked for pregnancy via blood and urine and it was negative. i am waiting for other blood tests to come back. is there a chance i am pregnant but have low hcg?