I don't think I was ever agoraphobic, but my depression and anxiety definatly impacted on my attendence. At one point I wasn't able to attend for a while and couldn't get myself to an exam due to the anxiety caused by a reaction to prozac, I thought the world was falling apart and I'd be hit by parked cars and trees would fall on me. I decided the only way I'd be able to complete my course was to be honest with the programme lead about the fact I was struggling with mental health problems. I also submitted evidence from my gp stating not exactly what my problems were, but how they would impact on my study. I also took a year out which was supported by more information from my GP.

I was worried at first about whether this would ruin my chances of working and completing my course as it was health care based, but being honest worked in my favour and I was able to complete and am now working in the same field in a hospital.

So really I would suggest finding out who is the person to speak to, someone who is in control of your course. You don't need to say exactly what is going on, but make them aware. It should be treated in a similar sense as how a learning disability would, so that they are there to help you find ways around your problems. They may be able to make sure you are given/have access to lecture notes. They should also make staff aware that you may need extra support in the sense that they can go through stuff with you alone if you need to. That shouldn't mean that they all have to know what is going on though.

I hope that makes some sense, good luck with your studies!