It's absolutely okay if you’re worried about not being okay physically due to the size of your penis, but think about it, size doesn't determine sexual fulfillment for your wife. Most women are attracted to other things than size in a relationship. Being open and attentive to her needs is key. If you feel the need to better your performance, address your overall health first, by exercising, eating healthy, and managing your stress levels. If you're still concerned about size, visiting a sexologist can provide you with more understanding and potential solutions tailored to your specific situation.