Well, just by guesstimating, your 190lbs probably puts you at a solid size 8. As much as it sucks, when you stop losing weight at a constant pace, it's usually a sure sign that you're nearing or have hit your body's "normal" range, so from here on out expect a fight for every pound. Congratulations!
Lower your daily cals to 1500-1800 and try doing 75% cardio, 25% everything else for a few weeks and see if that does anything. It might also be that you need to up the intensity. That's the bane of being in such good shape, you always have to bump it up a notch or find something new and more intense. Your body will get used to your normal routine and you will burn less calories. That's the only way I can lose weight anymore, but at this point for me, anything less than 135 isn't easily maintained without starving myself.

I also heard that lack of vitamin b could stop the body from losing weight as well, so I try and take that in the morning.. it definitely gives me more energy. What about the idea of doing a detox? I like to do them once a year, lately it's been once every 2 years.. but I find it gets things moving in my body. Also changes my mindset, gives me something else to think of. I've done The Wild Rose Detox before, it's fairly easy to follow, and you get to eat!