Should be ok. Are you fermenting in glass(I assume so since you say no krausen), or bucket? Most will say with a bucket it can just be a tiny leak to keep airlock activity at bay. If in glass, how long are you watching before you say there is no activity?
If your beer is that warm, a lot of your fermentation happens in the first day or two.
If in glass, how has the color changed? Mine always seem to get several shades lighter for a couple days before the yeast begin to separate out.
Mostly these are questions just to compare. Odds are good that if you had a day where you had noticeable fermentation, then you are fine.