The Social Work team and other people (college welfare/pastoral staff, for example) will be able to help and advise the OP on her rights regarding claiming the benefits she will be entitled to, housing, accessing childcare for her return to college.
Depending upon the rate of pregnancies to younger Mums in your area, OP, there may be a dedicated midwife and a consultant obstetrician (the doctor at the hospital 'in charge' of your care) who is often responsible for all the younger Mums. You may be able to access a younger Mums' antenatal group as well.
Have you done much reading about pregnancy, childbirth and childcare so far, @Kat140 ? There is a lot of information that you aren't likely to have heard before about what happens during pregnancy to you and your baby, nutrition to keep both you as healthy as possible, the tests you might have, what to look out for in terms of your health and what sort of choices you may be able to make regarding giving birth/what happens if you need help during labour or if you need to have a Caesarian Section.
You can also think about and plan how you think you would like to feed your baby - would you like to breastfeed or use formula from the start? Can you plan a safe place for the baby to sleep by you, somewhere to feed baby, somewhere to change them (a changing mat on the floor is fine - after all, if you get distracted and they wriggle off, they're not going to fall anywhere, unlike on a £500 changing unit), somewhere for you to be comfortable?
It's easy to see posts going on about how it's going to cost you thousands and thousands and panic about it, but babies do not have to cost that much. They need to be warm, safe, clean, fed and loved - this can be done with very little money. Babies don't care about whether you have the most expensive pram, cot or clothes for them (they're probably going to puke up and/or poo over them all the same).
Not everybody has a nice partner or parents, a safe place to stay or help to find their way around benefits and shopping and looking after themselves, especially when they are very young. They can also find it difficult to stay in employment or education, which then reduces their opportunities in the future. That's why Social Services these days are more proactive in seeing and supporting younger Mums from the outset instead of only getting involved once they're in terrible situations or worse still, never even knowing there's somebody out there that just needs a kind word and somebody looking out for them.
It's a good thing. They're on your side and on your baby's side and I hope you have a wonderful pregnancy with all these people around you to fill your baby's life with love.