I'm 6 weeks post op and my breast are uneven. Will I need another surgery? (Photo)

Sorry to disagree, you were neatly and clearly assymetrical preoperarively, not a slight assimetry... it was a remarkable one, this happens very commonly to 80% of patients undergoing breast surgery, and the other 20% have moderate to slight assimetry, since nobody is symetrical.Hoever, you are right that your right breast is too high, unlike the left one which settles perfectly centric to the nipple; this may be an acute onset of capsular contracture, in need of massaging systematically, supervised by your surgeon, asap and applied several times per day, every day. With massaging 70% of capsular contractures are solved, and the rest need surgey at 6-8 months after massaging has been quitted.Do seek your surgeon's opinion asap.

Thank you for your question and photos.  It is difficult to assess your pre-op photo, but your post op does demonstrate an asymmetry with your right implant sitting a bit high.  This may still fall over time.  I tell my patients to hold tight for a minimum of 3-4 months prior to any revision surgery as the implant can still settle a bit.  If it doesn't, then a small revision will be necessary on the right to help the implant settle lower.

From your photo it appears your one breast implant has not dropped and settled yet compared to the other. I would recommend giving it time. At times it can take up to 3 months. Continue to follow up with your plastic surgeon.