Yes they work, although as everyone is different it can take a bit of tinkering to find the right medication and dose. I find venlafaxine works well for me, although it’s not the first line treatment any more.
Be careful about taking herbal remedies in combination with prescription meds as they can interact - always check with the pharmacist. Just because it’s ‘natural’ doesn’t stop them being pretty potent, St Johns Wort and Valerian especially.
Stay as active as you can - exercise triggers the neurotransmitters that give your mood a boost. A combination of antidepressants/anti anxiety meds, CBT (to give you strategies to recognise and head off the heebie-jeebies when the try to sneak up on you) and a cardiovascular exercise (even a brisk walk or some vigorous gardening/floor mopping!) are your best bet. A multi pronged approach is much more likely to be successful
For your particular issues around nervousness in meetings etc, I wonder if a public speaking course would help. It might be helpful giving you strategies to regulate your breathing etc.
Often when you’re anxious you start to hyperventilate which makes you feel nauseous and lightheaded, and then it becomes a spiral into a panic attack (I would get you a large slice of cake you’re hyperventilating quite a lot of the time - your body can get stuck inflight or fight mode). You can see physiotherapists who specialise in breathing, who’ll give you exercises to do to regulate your breathing - ask your GP. www.physio.co.uk/what-we-treat/respiratory/symptoms/hyperventilation.php
Most important - don’t be embarrassed about it. Your anxiety and physiological responses are because the neurotransmitters in your brain that aren’t doing what they should be but it’s fixable. At least 1/4 people at your work will have experienced something similar. You aren’t alone, and you deserve to feel your best. If it was any other part of your body you’d not think twice about taking medicine and getting physio so don’t feel it’s different because it’s brain related - it’s just another organ that can go wonky.