Back on Metformin

I was originally prescribed Metformin about 2 years ago - didn't get on with it at all, terrible diarrhea and nausea constantly, so I stopped taking it (wasn't TTC at the time)

Literally today, got off the phone with the doctor whose adamant I need to try again, gave me extended release tablets and told me that it'll be easier this time.

Cut to 2am and here I am 💩wide awake with stomach cramps, nausea and diarrhea.

Any tips to stop this happening on Metformin 😭