Totally normal, kelell, have no fears on that score. Lavender is a well-known herbal remedy for sleeplessness, stress etc, there's a reason the Victorians used it so much!
Over the past few weeks you've stood up to, and dumped, an abusive boyfriend who did nothing but bring you down and treat you badly. On top of that, you're confronting a very, very difficult mother, who not only invades your home and tries to influence your ds against you, but who also shares your workspace.
I'd say you're doing fabulously well. You'll keep crying a bit; you're mourning a lot, the loss of what the ex bf could have been, what your DM should have been. It's ok to cry in these circumstances.
You'll still have the odd panic attack, but you know what they are now, and they'll become less scary.
And then the "sort of Ok" times will get longer.
It's not going to happen overnight, but it will happen. You're very brave, and you're doing this for your dc.
You have my absolute admiration. 