Hello Dr. Nirja Chawla. Just Want To Know If I

Hello Dr. Nirja Chawla. Just want to know if i am pregnant.i have a regular 28 days cycle but this month i am 10 days delayed with my period.i took pregnancy test but i tried it for 8 times and all are negatives.i feel sick this past few days and i think there's something wrong with my stomach(bloated and gas pain)
And just today i think i have spotting with color brown.i put panty liner on my panty but now its almost 2 hrs and yet i just saw a little bit spot with brown color. Is this sign of being pregnant?
Please do help me.thank you and Godblesd