If you want your body to become adapted to burning fat for fuel, it is absolutely important to avoid snacking; it allows hormones time to adjust and when there is no sugar present (such as you're getting from that afternoon piece of fruit) the body will turn to fat as its fuel source. If you start making a habit of reading through these forums daily, you will find one of the things the moderators are constantly telling people is to make sure your meals keep you full for 4-5 hours, and if you feel the need to snack, snack on a mini meal of protein, veg, and fat. By dumping sugar, even in the form of fruit, into your body between meals, you're not getting the full benefit of the transition to fat burning and you're getting a spike in blood sugar. Not great. You're still doing a whole 30 as all your foods are compliant, but why not get the most out of it?
Also, weight goes up and down, and many people experience what seems to be an increase in weight/bloating part way through their whole30. Hang in there, give the program the full 30 days! And give yourself a big pat on the back for making this commitment and doing something good for yourself! I will be interested to hear how things progress for you.