First day of missed af

Michelle • Pregnant with baby #2 have 3 step children plus mine :)
I got my iud taken out sept 18 got my period the 20th lasted 3 days it felt like my usual period I had 3 yrs ago but not sure if it was or just bleeding because I took out the iud. Bd all October I've tested sunday and it was negative I dunno if I should wait till the end of this week to test again any suggestions?