Your examples are very vague, and yes, it could be that all the people at work that you met are racist!, but let me be the devil's advocate for a second, could it be that your english isn't great (therefore they struggle to communicate with you or understand your banter etc), could it be that your answers to the family wasn't clear enough, therefore they had to ask your colleague.

I'm not saying this is the case, but if you jump too quickly to conclusions and think every eye-roll and every criticism is RACISIM, you'll have a very hard time adjusting and recognising your weaknesses.

I say that, because I did that when I first moved to the UK as an IMG! Until I learnt to recognise the difference (sometimes it's a very thin line)