woke up late for suhur Ramadan

I don't know or think my fast is valid however fajr was 04:05 and i was woke up at 04:01. Saw it and rushed to eat/drink and so i did. I didn't take my phone with me, so i started eating and drinking fast as i could. Note i did have a feeling that it was fajr time but didn't think much of it and i live in Scandinavian country so there's no adthan to tell me that it's fajr n i must stop. Then i asked my brother what's the time? He said it's 04:07 is my fast for Ramadan not valid? I feel terrible and scared cause it's grave sin.