How far along are you?
I've come to understand that persistent highs are cause for concern (my endo has said running 200+ for 3+ days, for example) but that periodic highs for a few hours should be fine. I, for example, was at a conference today and made some unfortunate food choices and have spent the last 4 hours above 200 (I just broke under 200, finally). I'm not thrilled, but I'm not concerned that it will hurt the baby.
I think the goal is to try to keep your average bg in a good range (I aim for under 100). I tend to make aggressive adjustments to my basals and bolus ratios until my bgs are where I want them, and I correct if necessary. I have an office job and not a particularly active life, so I can afford to risk lows (I just keep glucose on me at all times); I know that's not as feasible for everyone.
I'm 30 weeks.