I think the advice not to stop ebf is because you build your supply up by putting a baby to the breast so the more times you do this, the more you increase supply.
Some women on here, you can see, successfully mixed fed at some stage and some went onto ebf later. In my experience this is more rare and if the goal for you is to continue breastfeeding, a strategy would help.
You may be one of the more lucky women, who has plenty of milk or you may be more like me and have just about enough. Either way, perhaps you could see you way to expressing milk. The easiest time to do this is first thing in the morning before the first feed. You will be storing all that nutritious milk you made overnight, which you thus far fed your baby.
If you express this milk first thing, your body will quickly reproduce milk for the first morning feed (a gap of 20 mins, preferably 30 is needed). It is the afternoon, where I had more issues with supply.
Depending on how much you managed to express, you could then try to use this milk to bottle feed with when you’re feeling tired later on in the day or if not needed, at night. Either way, bottle feeding overnight with expressed milk or formula will give you some respite. NB It may take a little while to increase the amount you can produce first thing in the morning.
The method I’m suggesting was really useful for me. Admittedly dd was older, in the months rather than weeks and an electric double pump was a must for me. I got up at 6, expressed, 20 mins later expressed again (the latter not absolutely essential). Then got dd up at 7 and fed her. I used this milk for the middle of the night feed and slowly built up stock, which I froze, for the odd time I wasn’t around.