Mirena

So, I've had mirena since the end of January. I first bled for 43 days. Then next period 30 days. After a couple more months it went back to a normal period bleed time. But this mont j e only had spotting. No full on period yet. The last two months I had light spotting before actually getting my period. Each time so light I didn't even need a pad. Just a liner. Is this normal? Could it be I'm not going to get a period this month? I know over time you period can quit but from what I read it happens usually with ladies who have had it longer than I've had it.