Chance I might be pregnant??..?

I am not even stressing over it. I'm younge and we all make mistakes you know. I had unprotected sex June 19 and a couple time before it. I havent got my period yet, I missed it. I have to pee alot more than usual, headaches stomach and lower bac pains. Spotting at the first of it for like 10mins. We used te whole "pull out" method but I've heard it doesn't work because of pre ***. Or whatever, I'm not saying I am ready or I am not ready for a Baby, but I'm not worrying about it. Any advice on if I could be pregnant or not? Don't judge me because I could care less for rude comments/opinions. But yeah please and thanks you.