Cranberry sups at 35weeks

So Im 35 weeks and I've been taking these cranberry supplement because I keep getting UTIs and its been really annoying. I've also increased the amount of water I drink ...again, but its been a week and I'm not sure they've made a difference. Everything was all good but then this morning I had that terrible annoying feeling of a UTI coming on. So i took my chewy and drank water the feeling is gone now but still its annoying it even came back. Maybe its cause they are off brand or maybe they really don't work ? Anyone else have this problem and any comments on the cranberry supplements???