I think it is a very poor idea to take T as a way to determine whether or not you should transition. However, that is what I am doing.
I have spent 10+ years trying to come to a decision about whether or not to transition, a lot of soul searching, and a lot of therapy. I just couldn't decide. Just couldn't. I decided to gamble.
I took one-quarter dose T for 7 weeks and then moved up to 1/2 dose for the last 3 shots. I am pretty confident at this point that I am going to transition. The fact that I told my boss yesterday that this is what I think I am doing pretty much makes it a forgone conclusion.
It took me 15 years to decide to do top surgery. I actually flew down to see Garramone for a face-to-face consult because I couldn't make up my mind. I scheduled the surgery and was back and forth in my head as to whether or not it was a good idea until the last week or so.
I seem to always need an escape hatch in order to follow through on what is best for me. It sucks, honestly. I still feel like I have "died and gone to heaven", every morning when I wake up and realize my breasts are gone. But, it is like I can't commit to something out loud.
Anyway, the biggest barrier for me transitioning all these years has always been my work. If I were in a different situation, I probably would have transitioned many years ago. The fact that I am typically read as male and have been able to dress as male throughout my life has probably made it easier to remain in this body up until now.
Know that if you do a "trial run on T", you are playing with fire when it comes to your voice. My voice is already quite low for a female, so it has been less of a shift. It really wasn't until last week that it became more noticeable. That is why it is necessary that I move forward with final decision making. With how good I feel physically and psychologically I can't imagine going off of T. I think it would probably be emotionally traumatic if I did stop taking it.
I would not suggest anyone consider a "trial run", unless they are ok with being stuck with a male voice living as female for the rest of their lives. Too, like others have said, you do need to be on it for a while before you move through the side effects and can really assess how your mind and body feel on it. It has been 11 weeks for me and I swear it is just this week that I haven't had any crazy side effects happening. Unless you take a very low dose for a number of months (which most people don't have the patience to do), it can slip away from you and your voice can really drop one day. It is not a linear thing (although I would suggest that it is more linear on lower dose).
I do not think that "trial runs" are something that should be encouraged by the medical community. I think a situation like mine...due diligence in trying to figure things out (therapy and time), might make it more acceptable. I think it is a slippery slope though and it worries me to think that there are more providers who will be open to allowing folks to tinker with testosterone without taking the time to be really, really clear about what they are doing.
It seems to me though that your issue really isn't whether or not you want to transition. Your issue is more about needing to get the "buy in" from your husband. That is a whole other issue. Sounds like couples counseling would be a good idea.
Good luck.