I need some advice...please...?

Ok so my AF is not suppose to come til the 18th, but in September it came two weeks early and only lasted 3 days & was really really light (my AF normally lasts 5 days). So like I said this month it's suppose come the 18th, I've noticed a brownish-pinkish color on the toilet paper when I use the bathroom since Friday, also, I've had these terrible headaches, my breast had been extremely sensitive & sore, I haven't really had an appetite at all, except for specific stuff (if it's not what I have the taste for I just start feeling sick when I smell it), heartburn out of this world, & I've been so tired. We (Me & my bf) have been trying since Jan to conceive, I haven't tested yet, out of fear of getting a BFN. What exactly is going on with me, I'm getting nervous.