Testosterone - vaginal cream or transdermal cream?

Background: I'm in the early stages of perimenopause and have 4 main symptoms. Can't stay asleep, anxiety, can't lose weight, low libido. I've read testosterone can help with all of those. Meds: my obgyn put me on 200mg prometrium, 5mg DHEA, and recently added a testosterone cream. No estrogen. My question: the testosterone cream she prescribed is vaginal. I keep reading conflicting information from the Internet. Is this going to increase my blood levels? Or am I better off going with a transdermal cream/gel? I'm not noticing any difference in anxiety or sleep.