Could this be BPD? What now??

So I looked at he most recent DSM for BPD and find a lot I identify with. I am constantly changing my identity (Christian to progressive, unsure if my sexuality, had girl it good girl, I blend in with those around me), I am quick to take little comments as insults, all my relationships are either distant or clingy or a combination of love and hate depending on the situation, I'm so scared of others rejecting me, I participate in self harm as well as some ED behavior. My emotions are intense always have been. Sadness and anxiety cripple me. The only things that don't match up is I hardly ever yell at people or outwardly show anger and I'm not a huge risk taker (I mean I self harm but I don't drive fast or steal it do drugs etc. I more "over controlled") what does this mean? What should I do?