My last day of my period was October 31st me an my boyfriend been having sex between November 5th to November 12th he has noted in me 12 times I already have 2 kids is there a big chance I could be pregnant?

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Timing is likely on the mark, if you ovulate within the norm, but there are more factors to becoming pregnant. It sounds as though you are trying to become pregnant, so hopefully this will be the month!

See what happens when your next period is due. Try not to get discouraged if it doesn't happen quickly. For many couples, it can take quite a long time even with good timing.