Help I’m going crazy

So normal before my period I have horrible moods swings cry and have bad headaches before I start af. This time the week before didn’t experience any of those. I’ve been really hungry and super horny. I use a couple apps one said I was late one said to test for pregnancy and the other said af will come this weeked. Well yesterday I started haveing a light pink period normal mine are heavy. Well this would mark period number two this month could this be implantation bleeding or just my period.. I’ve bee ttc for months now..