Oh @strangerhoes don't worry!
Calpol (paracetamol) and infant neurofen (ibuprofen) are two different drugs- they work differently, so are fine to give together.
My DS has awful fevers very often (he's had a long long run of back to back tonsillitis / hand foot and mouth/ bronchiolitis) to bring them down, we give a dose of both together, and then alternate for as long as needed. For example :
If he had tonsillitis and was in pain, with a fever of 39.4 at 6am id probably follow a pattern like this until he was better (i.e. The fever wasn't breaking through the drugs/ he wasn't in pain as they started to wear off) :
6am- ibuprofen and calpol
11am - calpol
1.30pm- ibuprofen
4.30pm- calpol
9.30pm- ibuprofen
Midnight- Calpol
For MY DS (who is older than your DC), this would be the right spacing to keep on top of his pain and fever. All kids are different though- some don't get on with nurofen, some (like my DS) don't respond to just calpol when the fever is that high. Unfortunately it's one of those Mum learning curves - how to give medicine at optimum times/ knowing when your kid really needs it etc.
The important thing to remember is no more than 3 doses of ibuprofen, and 4 of calpol in a 24 hour period.
I hope your baby is okay- have you had them checked over? Colds can easily turn to chest infections in very small babies at this time of year. Warning signs that your baby needs to see a doctor include (from NHS website)
your baby is under three months old and they have a temperature of 38C (101F) or higher
your baby is three to six months old and has a temperature of 39C (102F) or higher
you think your child may be dehydrated
your child develops a red rash that doesn't fade when a glass is rolled over it
your child has a fit (convulsion)
they are crying constantly and you can't console or distract them, or the cry doesn't sound like their normal cry
has a high-pitched or unusual sound when crying
the fever lasts for more than five days
your child's health is getting worse
you have any concerns about looking after your child at home
And I'll add this one-
If YOU think your child is possibly
More unwell than just a cold/ get a "gut feeling"/ feel worried that your baby needs a doctor- take them to one. And if that has to be at a&e then fine. At that age you cannot be too careful. No doctor will be cross to see a 14 week old, and will be delighted to be able to say they're fine.
well done - you're doing so well- the fact that you're so on the ball/ so concerned shows what a good job you're doing