Hello, I am 15 and a month ago I had protected sex. I am a week late for my period and am starting to get worried about being pregnant! I have taken 3 pregnancy tests and all were negative however my period still hasn't come which is why i am getting worried. I haven't been noticing any nausea, cravings, any spotting (as far as I am aware of) tender breasts or any changes in my breasts. However I am not sure if it has anything to do with this but a week ago I began to wake u for 3 days with a bloody mouth. Also slight back pain but I horse ride which I might of pulled a muscle as that happens a lot so I am not very sure. In the past two days I have been burning up a bit and slight headaches which I am not sure if it has anything to do with this as it might just be a cold I am getting. Also I have noticed that my vaginal discharge has increased slightly in amount and a little bit clumpy at times. I am sorry for detailing it a bit but I am very concerned. Can you give me some advice on what to do please? Thank you x