Toddler self weaning - cows milk allergy

Hi - has anyone got any guidance on if it’s required to use formula if children are under 2 years old with a IgE cows milk allergy? My child is 19 months old and on solids with dairy free equivalents of milk, cheese and yoghurt - so I do try to get her calcium requirements in that. I was a bit taken aback at reading the allergyuk site as I read they need formula if not being breastfeed it under 2? I have been breastfeeding but my child has started to self-wean quite abruptly so I’m desperately trying to decide whether I pump or what to do as my personal preference is not to give her formula (she’s never had it). Also I’m in a bit of turmoil as my hormones are all over the place from having milk, my period and a cold at the same time and I often feel hot and cold at night (at a time when I know my milk usually comes in). I’m thinking should I stop or try to pump as I had in my head that I would continue until age 2 but she’s really not showing any interest and I’m scared if it’s just because she has a cold then changes her mind that I’ll then have no milk and it will be like a double trauma happening. I’ve gone since Monday was the last time I feed my child (who only feeds st nights now). I’m just wondering if anyone has been through this. I’ve been told we can start a very slow milk ladder which is on hold until our colds have gone.