I use my tongues for private devotions etc. Even if your tongues are genuine, they are not for private use at all. All gifts are given for the benefit of the whole Church. Most teaching on tongues is based on misinterpretation of a small number of texts. Another deception is that tongues are some kind of heavenly language .
Tongues are just foreign languages.
That is exactly what the tongues in Acts Two were. Scripture tells us that we receive the Holy Spirit immediately we are saved . The idea that we have a second kind of option is untrue. However, it is a fact that God will give us power and authority to perform certain tasks and ministries, which He alone give us. But this is not a second blessing it is merely an expansion of what He has already given us at salvation.