19 month old 2 random vomitting episodes 3 weeks apart - any ideas?

[buzzybee]

DD is 19 months and been very healthy all her life apart from a recurrent chronic winter cough. Reecently the GP put her on low dose Lorapaed (antihistimine) as he thought it poss the cough was a symptom of an allergy, possibly to fungal spores.
3 weeks ago we came home from friends about 7.30pm, I had changed DD into PJs at their place and she was also in her sleeping bag. As far as I know she'd only eaten some toast and milk. When I took her out of the car (she'd fallen asleep) her breathing was a bit funny and half way upstairs she suddenly projectile vomitted - lots and lots. After cleaning her up and keeping an eye on her for a couple of hours she went to bed, was fine and nothing further.
Then today I gave her a bottle first thing, got her dressed and started to carry her downstairs and the same thing!! This time she vomitted again about 30 mins later (having eaten some toast), then nothing more and quite hungry, happy as normal etc.
Anyone have any ideas?? I'm wondering if its an allergy rather than virus? Can't imagine its food poisoning. There was a possibility she came into contact with blue cheese at friends the first time, but today we'd only just left her room and all she'd had was the milk (not old milk either!) in a clean bottle.
Thanks!

[buzzybee]

Oh and we're in New Zealand where its winter hence why she has cough now!

[purepurple]

I notice that both times you were carrying her.
Could that just be a coincidence or the cause for the vomiting?

[buzzybee]

That would never have occurred to me purepurple! What might be the trigger do you think? She's never done this before? The first and second time were correlated with the car and I do think she might suffer from motion sickness but how would this apply when just out of bed?

[purepurple]

I am pretty certain travel sickness can occur after a journey as well as during.
I would maybe just keep an eye on her and take her to the docs if it gets more frequent or if the vomit is showing signs of blood or is green.