Wow, it sounds like you've got a lot going on, firsttime! Is it likely that you'll be allowed to postpone your exams until August? Your university must have a welfare officer who could go in to bat for you - if the exams are supposed to be the first week in June, it might be an idea to get in touch with the WO. Your dp sounds like a star! Has he got exams too?
I'm studying Theology which might sound like a Mickey Mouse degree
but there's a lot to it - it's a bit of philosophy, a bit of history, a bit of literary criticism, a bit of anthropology, a bit of archaeology,a bit of sociology, a bit of...well, theology too! I'm doing lots of biblical Greek for my degree so I was translating last night, and a bit of biblical Hebrew. I'm hoping to go straight on to a Master's, which means spending the summer learning Hebrew properly 
My exams start in just over 3 weeks. I am definitely stressed about them and wake up thinking about essay plans / what's the Greek for such-and-such etc. My dh is lovely and extremely supportive but works long full time hours so in the week I'm the main carer of our 2 dc. Normally at the weekends we do lots together but for the next few weeks I'm going to be cramming - I'm planning on us having lots of lovely time together after the exams!
So today we are going out for an early lunch and then I'll be doing a past paper this afternoon - bleeeurgh!
Please let's keep this thread going - I really feel like I need some support, esp. with other mums who are juggling lots.