this might sound weird, but having it checked now might help you out - i'm sure the lack of AF is possibly due to stress, but stressing about lack of AF will make it even worse! is it possible to get something happening to see if you can get back on the O track without actually trying (so ovulate, but avoid BD at the fertile time) - would possibly help to calm you down...

i know how extremely frustrating it is to just not know - or, to be like me, know, and know that what works for 4 out of 5 people just won't work for me! grrrrrr!

good luck with finishing your uni stuff and getting on the right track! and remember, just cos you think you'll start to try in June, it doesn't mean you'll have luck straigh up - so your early 2009 baby might not happen (sorry, just trying to be the voice of reason - i've been through that heartache of expecting it to happen and then finding out it wouldn't!)