Strange question

Hello,

After 13 months of trying to conceive I got a BFP today...... Amazing news and over the moon but want to wait until the 12 weeks scan before saying anything!! None of my friends know we have been trying!! I've got a hen do and a wedding coming up and if I'm not drinking they will suspect something is going on!!! I've already Sussed the venues do not offer alcohol free wine / beer / cider!!!! So next idea is 'I'm on antibiotics' excuse!! Does anyone know of antibiotics u get given that really can not be mixed with alcohol and what you take them for? Thanks xx