URGENT: lactic acidosis or (harmless) metformin side-effects?

Hi,

My endocrinologist put me on metformin for my PCOS (to start 500 mg with food, in the morning and in the evening). I started 3 days ago and took altogether 500 mg doses.

1st day - I was fine

2nd day - I started feeling tired (but it so happens that there's a lot of work to be done and I haven't slept well)

3rd day (yesterday) - I took my morning dose and around lunch time I noticed that I'm not hungry at all. I felt tired but I didn't sleep well and i worked all morning. Sometime in the afternoon I started feeling a bit nauseous but it went away after a nap. We went to dinner at our friends' house. I ate a lot of food I normally do not eat (foie gras, creamy desert...). Early in the night I started feeling more and more nauseous and I threw up. I felt week, as I always do when I throw up.

This morning I feel tired and a bit weak and I plan to stay in bed. My appetite is back.

The symptomrs I mentioned could be common metformin side-effects but also they can point to lactic acidosis.

Could lactic acidosis be caused by only 5 low doses of metformin?

I have no kidney, liver, lung or heart problems.

Thank you!

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