Need Advice : Failing Access to HE

Hello. I am a mature student with an educational health care plan. I started the year with good attendance, however in my second semester my attendance has gone down to 50%.
I am on track with all assignments and work, however I have missed a "practical session" that I wasn't aware of. The lecturer said they would let me know in advance so I can sure to be in, but I was never notified.
I have now been told that I will fail the course if I don't request a Exceptional Circumstances with evidence, so that they have time to be free and deliver the practical.
Is there a possible way I can battle this decision considering I wasn't informed like expressed I would be?
If I was to obtain a doctors note, mentioning my stress and anxiety, mental health issues as my reasons for time off - is it possible they will accept an extension?
Please give me advice. I don't want to fail on my final weeks just because of a missed practical session. I did so well.

Hi There,
Sorry to hear you've been struggling. Exceptional circumstances are circumstances that impact your ability to complete an assignment or exam or in your case your ability to attend the compulsory practical session. Poor mental health can certainly contribute to exceptional/extenuating circumstances. If you are able to provide a doctor's note or a letter from your doctor this can count as evidence.
Can you have a chat with your tutor, do they have a handbook or tutorial guidelines on what is and isn't acceptable as extenuating circumstances for the course you are doing?
you may need to submit an extenuating circumstance claim for each piece of missed work and you might not find out the outcome of whether or not this claim is accepted straight away. It all depends on the protocol your college has.
Best of luck to you
Essex Student Rep - Hayley