Toddler temp of 39.8 newborn has the cold too

[vacay]

Just worried really, dd 18 months has a temp as per title, doesn't really come down with calpol but does with nurofen. All started with a runny nose, now it's a cough and her being very very clingy and understandably whiney.
I'm worried about my 4 week old though, she is all bunged up and has a little cough, I'm so worried she is going to get the temp aswell!
What's the chances she will go on to have a fever ? Is she protected by my antibodies or is that only when you're breastfeeding ?
She is formula fed now, stopped bf after a week due to poor latch.

Thanks

Your toddler needs urgent medical attention, they can have a seizure with a temperature this high. You must go to A&E or call an ambulance. In the meantime undress the toddler as much you can and give as much calpol and nurofen as you can making sure you don't exceed the maximum dose (hourly and within the last 24 hours). Not sure how long breastfeeding antibodies would last. Your toddler should be your priority right now

She is fine with medicine, and back to herself once temp is down, she is still having wet nappies and has drank her milk this morning.
I was told by a gp when I took her last week that a&e is above 40 if temp not coming down with medicine, calpol brings it down abit but nurofen brings it down properly, obviously if this doesn't happen then she will be going to hospital.

I'm worried more about my newborn as she has no immune system so was looking for advice with that atm

If the temperature is responding to ibuprofen and having wet nappies absolutely no need to call an ambulance or go to A&E. The advice from the GP correct.
I'd just keep an eye on your newborn and see how they go. I'd have a lower threshold for seeking medical help at 4 weeks if she does develop a temperature. Call 111 if need be.

@Holymotherforkingshirtballs Hi thank you for this I did doubt myself for a second but she is fine with medicine, fever seems to have broke now too.

Either my newborn it's so worrying, I feel like I'm just waiting for her to get poorly, it's also hard to differentiate between normal newborn breathing which can be random and go fast and then slower or if she's genuinely starting to struggle !!

Don’t be bloody stupid

The NHS own website states for a temp at this level they only want them to be seen by a GP if it’s been 5 days!

@Kosenrufugirl Your information is completely wrong and scaremongering.

Febrile convulsions are not linked to a particular temperature and are found in a percentage of children (who cannot be predicted), usually under 5 and at the start of an illness. They represent an immaturity and overreaction of the temperature control mechanism in the child's body. They are self limiting.
Info here: https://www.nhs.uk/conditions/febrile-seizures/

Please look at the advice here for accurate information and the things to watch out for. https://www.nhs.uk/conditions/fever-in-children/

FYI I found the same with the last night temperature my toddler had. Nurofen worked but Calpol was less successful. Then the GP reminded to dose Paracetamol by weight and that worked better.

https://www.hse.ie/eng/services/list/2/gp/antibiotic-prescribing/prescribing-for-children/paracetamol-dosing-paeds-v1-nov-21.pdf

Edited to add, they only want to see a toddler with a temp over 40 if it’s not responding to medication, they are unhappy in themselves or they are not producing wet nappies. 4 week olds are a whole different ballgame so if she starts a temperature please check in with a healthcare professional.

With your newborn if you have any concerns about them, especially if they have reduced feeding or change in behaviour I would seek help through 111.

Regarding immunity: https://www.nhs.uk/common-health-questions/childrens-health/how-long-do-babies-carry-their-mothers-immunity/#:~:text=Immunity%20in%20newborn%20babies%20is,have%20passive%20immunity%20for%20longer. might be useful