There're couple of ways you can try. If someone is listening to you, pause and ask this someone how. Or only for understanding's sake, spell it eg "I don't know how I'm supposed to pronounce A, B, R, A, C, A, D, A, B, R, A..." and then keep the rest of the sentence going. Use synonyms instead, if you know what it means.
There're "rules" when you get to be familiar enough with the language, but not always so reliable---Mike likes Nike. So what's relatively reliable for now for you, is as other answerers have forgot to mention above but you sure heard of, the soundmarks, aka, yin biao.
Yes, Mr. CoolGuy, yin biao could really be our friend. But merely that isn't enough. Try talking to natives more often. Things like stress, schwa, liaison, colloquial pronunciation change, so forth are also needed to pay attention to.
I was gonna say at first that the reason I found this question interesting this time is because I liked your awesome haircut. How did you do that?