Is there not a course forum that you could ask for help on?
I’m currently nearing the end of MS221 Exploring Maths and feeling in a similar situation to yourself, but the course forum for this has always been quite helpful, plus it’s moderated by course tutors who will let you contact them directly if you’re own tutor is away and ask nicely.
Also do you have an “Assessment Calculator” section on your course website so that you can see what marks are needed to pass this module?
There is a UK advice line available on 0870 333 1 444 which might be worth trying.
WRT to worrying about being able to cope with level 3 courses, think back to when you made the jump between level 1 and level 2. I know that when I was doing level 1 courses I was thinking ‘OMG this is hard, however will cope with level 2?’ Now I look back and laugh at myself for thinking that level 1 was difficult, but I’m sure that I’ll have the same feeling going on to future courses.
I’ve emailed you at the address in your profile in case you want to get in touch with me directly 🙂