I'd just play it cool, tbh...there's not much else you can do. Who cares if it's a rejection? Who cares if it's not? Either way you have to wait.
Just email back passively like "ah ok, good luck on your exams, inabit "
Just don't act needy but don't act like a dick just because she may (or may not) have rejected you.

Hey there folks, a question. Sorry if this is long.

In the BDSM Fetish scene in London we have monthly get-togethers called munches where we go to a pub and talk to each other. Last month a German girl was there, I went up to her and we started talking. She was very very nervous because this was her first event in the BDSM scene and she's not sure what she likes yet (switch/top/bottom/domme/sub). I could see her eyes darting around the room sometimes and I said "I think you're scared in case you meet someone you know here" which she agreed with.

She said "I'm going to the toilet", to which I thought "Oh great, she's off!" but she said "I'll be back". While she was away I moved to the bar to buy myself a drink but she came back before I got served, and couldn't find me so I waved her over and offered to buy her a drink (she accepted). Yeah I know you're not meant to do that but it felt wrong not to in these circumstances.

A mixed group quickly joined us (it turns out they'd been talking to her before I arrived) and took her off to another club.

At the most recent munch - just a few days ago - she came back and she came to talk to me as she arrived. She immediately offered me a drink and I said I'd give her the money for it. but she refused because she remembered I'd bought her a drink last month. We speak for about 10 minutes and I start touching her, at first almost accidentally on the arm and later on her middle back as if to 'support her'. She asked me a couple of questions about stuff we'd started to talk about at the previous munch, a month ago. I was relatively impressed that she actually remembered that stuff. Anyways I got her e-mail address and proceeded to mingle and talk with other friends there.

I e-mailed her the next day telling her that I enjoyed our conversation and that I hope her second munch was enjoyable, and then asked if she wanted to go for
to which I got the reply,
She does have exams for the next couple of weeks she had mentioned this when we talked so it's not total BS on her part, but I feel like it's a reject or perhaps a LJBF. My SPAM (both girls) think that she's genuinely too busy and that'll 'take time'.

Could I get advice from people on here please?

Thanks, NML.

That's not a rejection or LJBF, that's legit. She's busy. Wait a while and reconnect later. Go out and meet others. you still have a chance.