Nerves?

So, April 23rd, I found out I was pregnant. About 7-8wks. My bf and I decided it wasn't the right time for us to have a baby, and decided to use medication to induce an abortion/miscarriage. I read that I should have my period within 4-6wks of having completed the 'task'... but here I am and no period. I had some spotting a couple of weeks ago, but my periods have never been that light. I've always had a weird, non-predictable cycle.. I feel like I might need to re-test. I'm paranoid about getting pregnant all over again. (I have a blood disorder that prevents me from taking oral contraceptives, and foolishly don't use much else, I know, save your judgements on that one..) advice?