Light brown spotting and subtle back cramps

Hannah
Hey all - hoping someone can help me. My period isn't due until June 7th. Last night I had a severe headache. Woke up this morning with some subtle back cramping and when I wiped my discharge had a pinkish/brown tint. We are TTC but I'm not sure what to look for as a sign and it seems too early to test. Has this happened to anyone else? I've also been incredibly hungry recently with nausea if I don't eat immediately when the hunger strikes.