Heeeeelp

Im iregular ans I didnt get my pd on August but got it in september didnt get it in october and today im 33 days late did a pregnacy test on the 19 of october and it was bfn did another on the 27 and again bfn ive been super tired i sleep all day wake up and wake up more tired than i was before my 3yr old tells me i have a baby in my belly but did another test on the 5 of Nov still bfn but when i was pregnant with my first i was 6 weeks pregnant when i found out and my my pt was a suuuuuuuuuuuper faint line so what do u girls think? When should i retest again? Ttc for 1yr and 6months