As a former self-medicater, and sometimes having to deal with Medi-Cal not wanting to pay for my prescriptions, there have been times that I've been without one or more of my meds at a time.
Also, since I'm wishing to remain fertile, I'm cycling on and off the Estradiol, but remaining on my Anti-Androgens.
When I'm on the Anti-Androgens, but off of the E, I generally stay at an androgynous level. My skin will get a bit oily, and my complexion gets a bit bad, but nothing a little makeup can't help. I also generally get depressed for a few days to a week. It's sort of like a post-partum depression.
When I'm off of the Anti-Androgens, it doesn't seem to matter if I'm on E or not, I start reverting back to a masculine body. My facial hair grows faster, my body hair thickens, my skin is oily, and my face looks gross. I also seem more irritable, (I've described this as a perpetual roid-rage).
It had been about 3 months from when I ran out of my self-medication supply, before I was able to obtain the doctor-prescribed meds. It took about 2 months to revert to that above-stated masculine point. Unfortunately, it seems that reverting is a lot faster than actually transitioning, as it took about 4 months to get back to where I was before I went off.
But when starting back up, your mood will change almost instantly (think of a marijuana induced euphoria). It will gradually taper off to a constant pleasant mood.