I would give it another day or so. Keep applying aloe, and I've also heard cold showers can help. And depending on where the blisters are you could apply a cold wash cloth on them. Stay hydrated for sure. I've also read you can drain the blisters but if you do that just be careful about the loose skin and keep it cleaned so it won't get infected.
You shouldn't pop the blisters yourself, let them pop on their own. When they open you are at higher risk for infection. Keep with aloe and cool compresses. Feeling chilled is normal with sunburn but if you are concerned with fever check your temp.
Witch hazel!!! I just had a terrible sunburn all over my body a few weeks ago. Rub witch hazel on it and you'll feel much, much better!!