Hello beautiful ladies!

So I had my son almost 4 months ago, I got my first period at 2 months PP and haven't had one since I've had some spotting here and there when I wipe but other then that nothing? I was irregular before getting pregnant so I kinda figured this would happen lol I'm 7 days late and the pregnancy tests I've taken are negitive. I'm not sure what's going on... Any of you girls have this problem? Was there anything you took that helped you regulate your period? There's nothing more I want then to have regular cycles for once in my life dang it!