Every aprox 4-6mo my 3rd molar has a growth spurt (i'm 25yo), when this happens my gums around it get swollen and sore 4 aprox a week, do i need abx?

You need OS: There is not enough room for your wisdom teeth or they are positioned to accumulate bacteria. If the infection is reoccurring you should see your dentist or an os (oral surgeon) for evaluation ANS treatment.

Evaluate : This is a common problem when a wisdom tooth is not completely erupted and you can't keep the area clean and healthy. This is an infection that you keep getting. And it will not get any better. The best thing for you to do is see a dentist, or oral surgeon and have it evaluated for extraction. You can cause damage to the adjacent tooth. So take action now.

Recurring problem: It's not really a "growth spurt" that is causing your recurring problem. It sounds like there is insufficient room for you wisdom tooth to erupt into its normal and correct position. The overlying gum tissue gets at least inflamed if not infected. The tooth most likely needs to be removed before it becomes an even bigger and emergency problem. See an oral surgeon asap to have it evaluated.

Yes, & Oral Surgeon: The swelling and pain is a result of the 3rd molars getting infected. Strong chance they need to be extracted. See the 3rd molar expert - oral surgeon - for exam/recommendations.