Confused??

So I’m 5 months pp after having a baby but ended in a loss. My first period was in January and then next month it arrived in 28 days. March af was late and now this month I’ve been spotting and having brown discharge and my period isn’t suppose to come until Tuesday! First two times I got pregnant in one month barely trying and now I’m like what is going on? It’s honestly depressing. I was taking an iron supplement thinking I may be anemic. I was wondering maybe this coming month should I try fertilaid supplements. Any advice I’m lost right now