No worries I remember uni days well - its a different sort of pressure! My understanding is that you have 18 months to complete your ATPL exams from the date of your first exam. From completion of your ground exams, you then have 36 months to complete your ME/IR and MCC so no rush. You can blitz your hour building, cpl and IR in a matter of a few weeks funds permitting. In your situation I would say make sure you get a good degree to fall back on in case flying doesn't work out for whatever reason.