what does this mean A new pingback on the post "Home Remedies For Menstrual Cramps" is waiting for your approval
This means that you have linked one of your post i.e. "Home Remedies For Menstrual Cramps" in one of your other posts
It is a trackback but it might be spam too if it is unrelated to your topic. So, just check that it is not a trackback spam and is a relevant trackback only. Also check the link for any signs of your website name or name and if there is none then it is a spam trackback in most probability and you can delete it.