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Hi thank you for your message, please note that I will look to provide an accurate but nevertheless speedy reply to your inquiry. I am sorry to hear about your situation but I will endeavour to help you today.
No you can nominate your old home that you are selling for a period of up to 3 years and therefore not pay CGT because it was your main home. You can read more about the exemption here: https://www.gov.uk/tax-sell-home/absence-from-home
The 9 month rule is that you always automatically get a property as treated as your main home for the last 9 months of ownership if you have previously lived in it as your main home for any period. I trust this assists