I am 8 months on HRT, and 6-8 months I noticed the visible changes in my face. Its subtle but also signficant for me.
Everyone is different, just keep waiting. You can not overnight these changes. You need to be patient no matter if youuse injections of pills. I know we can not discuss dosage amounts, but re you taking a high or low dose? My sublingual dose increased as the last 8 months have gone by, and that worked well for my body.
Swtching to injections is not a bad idea, though my dr. says its a myth that either method provides different results. Girls on susans will tell you differently, and as they are the ones tking these hormones - I would definitely take that into consideraton. However, I tend to trust my drs opinion as she works in a trans clinic and is a dr and all. I will probably try switching to injections after a year or so if my breasts dn't seem to be movng, just to see if thatd help.
be patient, and most importantly be realistic about your expectations surrounding these changes. My body has changed a lot, but if I look at myself with a very bad perspective, I can also feel like nothing has changd at all...the changes are subtle and the same person I was before is still there so its easy to feel like I didnt change sometimes....<1yr on HRT is really too early to measure the kind of changes something like HRT can bring. Or bodies have been steeped in testosterone for years and years...they are being introduced to a new endocrine system and so they respond accordingly, but there is a history of male-ness that they are stepping out of, it takes a while.