actually you are born on the cusp and someone who is born on the cusp will have both energies influencing them. As per the chart I have made, you are Dhanu Lagan with mithun rashi. Ketu mahadasha is going on. Else if you want to be very sure you can do birth time rectification that is a method of checking your exact lagna based upon your life events. But this can be time consuming and needs for of work.
Blessings,
Navneet Khanna
Astrologer