My girls can get quite sever reactions to mozzies as well, mum said i did as a child but outgrew it.
There are quite a few products on the market now to assist in them NOT being bitten so they are worth a try.

1. Mozzie Bands - can be quite expensive $20 for an 8 pack but the girls tried them and didn't seem to get bitten.
2. Barrier repelling wrist bands - was about $5 for a 2 pack from IGA but lasts up to 160hrs (if put back in tis carrier) - haven't used them yet but going to.
3. Mozzie plug-ins - we had these in DD1's room - worked well but 1 night it over heated so we got rid of it.
4 Mozzie Dots - a friends little girls have SEVERE reactions and she has these little stick on dots you can put on clothes.
5. Aeroguard etc.
6. Citronella candles

These are just some of the ideas i put in place for DD over summer aside from long sleeve clothing etc.

In the meantime though we have claratyne at home and take it camping and if worst came to worst i still have DD2's epi pen.
Once DD's ear swelled up so bad DP took her to hospital

Hope she's ok hun, i'd get her checked at the Dr just in case they think she might need an Epi or something though, you can never be too cautious.
The other thing to remember is mozzies can carry viruses so if you see a severe or longer lasting reaction it's good to get them checked out JIC... DP's cousin got Ross River Fever and it wasn't nice