So confused.

So my last af was on the 28th of sept. I had a little spotting when I wiped on the 21st and nothing since. I was supposed to start today and all I have had is a little cramping that started around 530 tonight and some spotting when I wiped twice. Now I have no cramping and no spotting. Someone please help me, so confused. This is my third month actively trying for my forth. Oh and my last shot for depo was in dec of 13.