Glad to know that all turned out well!
Just to add a few pointers - if for whatever reason you do remove your shoes, turn them upside down, dust them and then put them on. This removes sand as well any critters that may have crawled inside.
2) if you have ice, use it immediately! Apply on the bite/bruise/sting/cut. Any kind if injury, ice will reduce the inflammation and pain.
3) might be a good idea to carry some Bruffen/Voltaren or similar over the counter pain killer. Pandadol/Paracetamol is too mild and NOT anti inflammatory. A calamine ointment will help as well. Lastly an antihistamine will help in Case of any allergy. Just make sure that all these medicines are kept out of the heat and not kept in the car!
Keep safe guys!