The vaccine goes into the muscle and so it is normal for your arm to ache a few days after so I wouldn't worry about that. Also, there are scare stories out about every single vaccine available; if they weren't pretty safe they would not be reccomending every young teen to get them done so I'd try not to read those as all it means is you'll get yourself more worked up and those themselves can make you feel worse as psychologically you will start to develop those symptoms (I'm not saying that is what is happening right now).
How were you feeling at the day you had the vaccine/ the day before? Were you ill then? What the
vaccine does is it stimulate your immune system against parts of the virus that they are wanting to protect against, in this case the Human Pappilloma Virus; the main cause of Cervical Cancer. So what they do is they inject (in the case of the HPV Vaccine) a molecule that has parts of it that are the same as the virus. The body sees these and sets up an immune response. They aren't weakened forms of HPV so you cannot be affected by that but during the time your immune system is fighting against the vaccine (which is what gives you protection) you are relatively immunosuppressed against other things and so you can feel a bit ill for a while and as well as that, your body fighting against it uses quite a bit of energy (the same as if you had a normal viral infection) and so because of that you can feel a bit unwell too and so it is normal to feel unwell for a few days.
If you keep worsening then it is a good idea to get checked out but at the moment you should be fine. The worst cases with this/ any other vaccine is the chance of an allergic reaction but if that were to happen it would've done most likely within 20-30minutes after you were injected.
