My cycle came on October 21st through the 26th that's when it went off and I haven't saw my cycle yet for the month of November I've been having a lot of gas and always hungry can't get full so do you think I need to wait until the beginning of December

You could just be late this month, it's really not that uncommon.

How uncommon is that how much later should I wait to determine if I'm pregnant I have two children already and I carried them for six months and didn't show until I turned 7 months