When can i have start having sex after chemical pregnancy?

I had my periods on 17th. 12 days after due periods. Tested positive on pregnancy kit and blood with low hcg levels. My elder told me to abstain from contact for like a month or so because it was a minor abortion. I'd like to know is that really so? I think they are just exaggerating it as an abortion. I did not have d and c. And it's much like normal periods just heavier and longer. When can i have it again? And is it safe to rub vagina till then?