if you do the visualizations, then they happen, but it does not mean that one has to 'feel' the effects straight away. I used to not be able to e.g. 'feel' my chakras, but persisted, and now it is no problem. In some cases there might be outside blocks/ forces trying to stop the connections - so just ask for them to be removed, always. (and in the mean time, hug some trees, or lay on the ground, if those tools help you already to ground).
Using spiritual tools can be a bit like going to the gym, they have to used regularly, to start to look different, and feel different Try to be patient, and ask for patience.
Have you tried talking to your mum, about how you feel in her presence? Try to discuss with her, why you might feel that way, and ask her how she feels? Maybe there is other dynamics at work? Have you tried meditating on the situation yourself, to understand what is happening exactly, and if there might be a reason for it (not saying that there always has to be one). If it is possible to talk to her about these things, she is open to using spiritual tools, and she is so low on energy, she needs to leech yours, it is actually her, who would benefit most from using tools, that could help her regenerate her energies....
I generally ask for protections for myself, but also for protections for the outside, against any confused energies I might still generate, or which might come through me.
Last but not least - the supplement that helped me most in the past, helped me overcome chronic fatigue is fact - is Vit D. So if you , and or your mum, might be low on it - taking enough of it, might be a really easy fix!