Metformin overdose while pregnant?

Re

I didn’t think I took my Metformin tonight and so I took a dose(1000mg). Now I am second guessing myself whether or not I originally took it? Which would put me at a dose of 3000mg today. My dose per day is 2,000mg. I am 5 weeks pregnant. Doctors want me to continue to take it in the first trimester. Do you think I’ll be ok?