Heartbroken as husband diagnosed with Stage 4 Glioblastoma

I am still struggling with my husband's diagnosis and just can't believe that he will be leaving me on my own.

I have been on antidepressants for a month, but they are not really helping, just causing terrible nausea and upset stomach.

I have been searching and searching the internet to try and find something positive, but the prognosis sounds so poor.  

We have been told that the tumour is inoperable and he will have radiotherapy and chemotherapy.

I had never heard of this a couple of months ago and now it is consuming my whole life. 

My husband is just carrying on as normal, but I am falling apart and just wish I could be stronger for his sake.