It is always advised to avoid any form of intercourse, protected or unprotected, for two weeks after an abortion
. Else, it could lead to infection, bleeding and in the rare instance of an early ovulation, another pregnancy
, which is not wished so soon. In the current scenario, you need to see a specialist for a proper examination to exclude any local causes and get a sonogram to confirm absence of any retained products. If everything is fine, you could be experiencing a natural period. Hope this helps.