You sound like such an incredible mum making some seriously impressive calls in the way of your son. He's so blessed to have you in his life.
Would you say the 'clingyness' is a reflection of the strong connection you have with your son? It's amazing how our kids start off so young when it comes to turning to the person they come to trust the most. Having worked in the area of intellectual challenges earlier in my life, one of the things that really stuck with me when learning about non verbal communication is 'Any form of behaviour is a form of communication'. So, when a little non verbal person (a baby) turns to us in some significant way, it can say a lot: Mum, I trust you to make me feel better because I don't feel so well, I trust you to keep me entertained because I'm bored (especially with entertaining playgroup shut down temporarily), I trust you to make me feel more secure because I'm feeling a little bit scared, I trust/need you to take the poop out of my pants because this feels seriously uncomfortable :)
You sound like a trustworthy mum, in your son's eyes, not one who should be doubted and challenged so critically.
Don't get me started on all the people who insist 'you just need to try harder' with breast feeding. They may as well have been saying to me 'You're not putting enough effort into what most mothers can achieve naturally. You're a failure at trying and a failure as a mother'. It was my mum who insisted I stop trying, as this was obviously contributing to my depression. Had trouble breastfeeding with both my babies, who are now grown teenagers. I'm a strong advocate for women's mental health coming first, before breastfeeding, especially when there are good formulas on the market these days. Btw, when I changed one good brand formula to the gold version, colic was the result. Changed her back and not a problem. People told me I was crazy, believing it was the formula causing problems. You learn as you go along that a mother's instinct starts early. The doubt that others put into your head overrides such instinct.
You're an amazing and inspiring example of a mum trusting her instincts, questioning others instead of herself.
I was lucky to have a legend of a maternal health centre sister. She wondered with me when it came to the challenges I faced, making suggestions (based on her experience), not giving orders. From day one, it was other people around me who posed significant problems.
You're a brilliant mum :)