I don't care if this is fake or not - if someone in a similar position finds this thread in the future via a Google search or similar, then it will do some good regardless.
Oh love - you aren't the first and you won't be the last. You will not find judgement here, and anyone who does will be hounded off the thread and be deleted by admin. As someone up thread said - there but for the grace of god (i.e. it could have happened to many of us).
Realistically, although it is possible, without an incredibly strong support network it will be difficult to raise a baby on your own without it significantly impacting your life in ways you can't even begin to imagine right now. From education, health (mental and even physical), financial, etc. Do remember as well, you won't just be connected to your child for life - you will also be connected to the father, which may not necessarily be a good thing (I tell my daughter that choosing who to have a child with is one of the most important decisions you'll ever make).
A medical termination so early in the pregnancy is physically pretty straight forward, and, although of course you may struggle with the emotional/mental health aspect of it (although not necessarily), there is also support available for this as well in the form of counselling.
https://www.msichoices.org.uk - MSI (formerly Marie Stopes) can talk you through your choices, arrange for a termination if this is what you want, and also provide counselling.
I also wanted to just say something about the fact that you have said that you have been sexually active with "quite a few people". No judgement here, I myself was very sexually active in my teens and early 20s. In hindsight I realise that my self esteem was absolutely in the gutter and was desperate for love and attention - I was also raped in my early teens and my reaction was hypersexuality as a trauma response rather than avoiding sex. I'm worried that you are struggling with either an event in your past, or feelings of low self worth and esteem. It sounds as though you may have grown up without a significant female figure in your life, which I'm sure must be insanely difficult, especially as a teenage girl. Young Minds (https://www.youngminds.org.uk/young-person/find-help/) are a charity which supports children and young people struggling with their mental health if you do feel you may be struggling.