Hot tub & drinks plausible excuse - early pregnancy

[BiscuitsAndBabies]

Hi lovelies,
I've not posted anything on mumsnet before but I've got a question I'm hoping someone could advise me on please.
I've got two children a 7 year old and a 13 month old and we've just found out I'm about 4 weeks pregnant, so it's very early days. With both my previous pregnancies I told everyone within days of getting a positive on test but this time I'm trying to keep it quiet until 12 weeks.
My friend has invited me to her hot tub and have some drinks.. my partner works shifts and I breastfeed still, so I rarely agree to go for drinks and haven't seen much of my friends with lockdown etc but when I do get out I'm usually the mad one who encourages everyone to drink up 🙈
I would like to go as my partner is actually off at the weekend, which is rare but I need a plausible excuse for not getting in the hot tub (partner suggested saying it's my time of the month but I fear I'd need an excuse to not drink too which might seem odd?) And an excuse to not drink.. any ideas that could cover both would be much appreciated.
Sorry for long ramble, if you've stuck by me this far thank you x

Say you have raging hangover from night before so can’t face drinking but you’ll pop along for a couple of hours - wear your sunglasses to help with the hangover look 🤣

It's up to you obviously, but I think if you're suddenly not drinking, smoking and avoiding the hot tub... They will guess. I personally would either tell them, or say I can't go.

I think you need to tell them or not go.

Thanks everyone, in the end I discussed it with my partner and I've just told my two best friends. It's all fine, they're excited for us and we're going to grab some pizza & socially distance - thanks all x

If they’re your best friends then I’d just tell them. Or if they’re the kind that won’t ask if you say you’re on antibiotics then go for it. I remember my very thin friend suddenly looking a bit more curvy, being sick and telling me she was on antibiotics and I just kept quiet knowing she’d tell me in her own time. Also reminds me of myself trying to keep schtum about my own. I had a Hen weekend to go to at 6 weeks (found out very early!) and I had to tell the two bridesmaids who I’d never met before, before my own friend so as not to steal her thunder. They were brilliant, they got the Hen drunk enough that she didn’t even notice me not participating in bottomless brunch or shots. There’s also no shame in having a third child 😂 Have a great time in the hot tub! Xxx

Ha, literally just seen your update :)
I’d prefer pizza over hot tub myself anyway 😂