Missed AF a full week now?? What's going on with me

Last night very late before I went to bed before I went to pee when I wiped I notice some very light pink but nothing on my underwear. I decide to chance to another white underwear so I can track what's going on.. In the middle of the night or around 6 am I woke up and was thirsty I went to the kitchen and get me about 2 big cups of water. Then I fall asleep and woke up at 12:24 when I went to the bathroom I check my underwear there were nothing then when I whiped I see the same thing but less. 

I just want to know what is going on with me.. Is it AF a week late or what is that.. 

P.S last night I went to the bathroom every hour and my back is killing and the reason I know because I'm re watching prison break and every episode I see myself in the bathroom.