SECOND AF After Miscarriage

Rhonda • 31 yo mother of one, born Jan ‘17.
Hi ladies- I have a question for those of you who have already had at least two periods since your MC. After having your first normal period after you MC, did your body get back on schedule? 
Last month I had my first period after my MC, and have felt right back on schedule. (I MC at 7 weeks). Now I'm due for my 2nd period and it hasn't happend. I was never, ever late before. And I feel pregnant again (I know- sounds crazy!) But I took a test (or two) a few days ago and got BFNs.
Any experience with this?