I have to admit I'm a bit of a worrier but how do you know if your baby is warm enough?

If it is ready for the baby to drink, the milk should feel warm, not hot or cold. I put DS down in a sleepsuit, and tonight I also put a bodysuit on underneath as it is cold. If your baby is damp or sweating, that’s a good sign that she’s over-bundled and moisture is accumulating on her skin. Even in warmer months, it's important to monitor your baby's temperature to make sure they're warm enough, especially indoors. Making sure your baby is not too hot while sleeping is just as important as making sure she is warm enough.

In the early months of life, most babies have difficulty maintaining the appropriate body temperature.
Baby chicks have the remarkable ability to find their ideal zone of warmth in the brooder and if you simply note your chicks’ positions, you’ll know whether the brooder temperature is too hot, not warm enough, or juuuuust right. It definitely takes practice to be able to tell when your baby is too hot or too cold. SIDS risk for your baby to be warm the recommend temperature for the nursery is 68-72 degrees - you are right to not put a blanket in her crib at this time. You can put her in a sleep sack.

Now that the weather has changed, I'm not sure if he is warm enough. How can tell if my baby warm enough at night during bed time?
If it is too cold, put it back in the cup with freshly heated tap water. I use a gro-egg room thermometer and use a cotton sheet with a blanket, folded in accordance with the temp guidelines, If it is too warm… Baby is 15 weeks, since day 1, I've put him to bed in a Onsie and swaddle. It can be tricky to know what a baby is feeling when they don’t yet have the words to express it.