Hello hope u good quick question i had sex on my last day of period which is on the 19th of october and i had sex again on 21th,22th,23th,25th 27th and 28th will that means i will get pregnant or i will not and what if i have sex today will i be preg?

It's pretty simple: If a woman with regular periods is trying to get pregnant, and her next period doesn't come, then she is likely pregnant. If she starts having early pregnancy symptoms a week or two later, and her period still doesn't come, she's almost surely pregnant. Most women do a home pregnancy test after missing a period (the tests are very accurate after missing a period). Good luck!