I don't have any bottom dysphoria, but periods are never fun.
I use pads in girl pants, and wear boxer briefs over the top. Holds everything in place wonderfully. My time usually comes every two months, and the bleeding only lasts for three days so it's not the nightmare it could be.
I have endometriosis - the bleeding's light but the pain is bad, painkillers don't always work and my back goes for some reason *-* that gives me dysphoria - feels like my evil female body is turning against me. And whatever happens to my hormones gives me bouts of depression and anxiety so bad I can barely leave my bedroom, usually takes a couple of weeks to recover. Happy times. Now I'm just complaining

Clothes? I wear a binder, but I don't dress to pass, because I don't pass. Much as I'd like to pass, if I really wanted to pass, I would have to ditch the blue hair and get it cut in generic man style, and that just isn't going to happen.
I went through a sort of steampunk-femme phase before I came out to myself - "maybe I'll start feeling like a girl if I start dressing like a girl" logic. The stuff I wore before then is essentially what I'm wearing now - I've just put away the skinny jeans. It's mostly gaming/general nerd hoodies and vaguely grungy trousers. My cousin told me the other day I dress like I'm waiting for the zombie apocalypse, which is probably fairly accurate.