I tell people... but thats just me, there are pros and cons each way. Its hard to tell people that mean a lot to you and that might judge you harshly, and employers might discriminate, for me I take that risk and live with it. My friends and families responses have been mainly good but others on this site have experienced hurt and rejection and discrimination because of disclosure - so think about it before you tell people and be prepared that you may get a bad response.
In the end, I think its hard to have meaningful relationships if people don't know about a really big and important part of your life.
Totally get you on the second point!!!! I should have known.... and so should my doctors... live and learn.... 7 years of incorrect treatment...

the beginning can be a bit hard, coming to terms with it and getting a meds combo that works without nasty side effects... good luck on your journey