Not Sure If Im Pregnant or not

for the past two months i've ben feeling tired, sick, nausa, and be feeling like i have to throw up, but my period came on both months, but this month it was 5days late then usual, but my period is on now and its light when i wipe with tissue, and soem days when i eat i feel like i have to throw it back up but it want come out, and i was wondering why i have these sympthoms and i feel pregnant some days, will someone help me.......thanks