we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
I sometimes get a tiny headache as well. But, only if I have not yet eaten breakfast, not had enough water, &/or have taken another stimulating nootropic. Once I eat something and drink some water, it's gone. **Typically, for me, if I get a tiny headache an hour after Modafinil, it's actually a caffeine withdrawal ache because I forgot to drink my morning Coffee (bc I already felt awake lol).