Anyone on metformin?

My first week I had to take 500mg with dinner, then was told to up my dosage the following weeks to come, once in the morning and once at night. I ALWAYS eat with them and had no problems the first week😊........... now that I’ve upped my dosage I get these weird dizzy, nauseous, hot-flash spells in the morning that last about 10 mins! Anyone else get like that?