think I'm pregnant idk

I haven't had my cycle this month. I think on the 30pth or 31 of last month my boyfriend came in me. So I looked at my period calendar it says on the 7 th I was supposed to get my cycle , but haven't so on the 12 of this month I had pinkish spotting that's all for that day and the on the 12,14,15 I have been spotting light brownish reddish  discharge. Idk when I should take a test. I'm not having any pregnant symptoms that I see.