I'd give it at least 2 weeks of no loss before I would think about changing my routine. I'm a newbie though, and I don't know anything yet, but I have heard that the scale can stick for awhile after a weight loss. So what happens is, you have one good week, then one or two or even three "bad" weeks, then another whoosh and suddenly more pounds are gone. My body seems to work that way anyway. I've gone on mini-diets before (never had this much to lose before, so this is a new experience for me) and that's how it always worked with my body. I'd lose water weight the first week, be stalled the second and third weeks usually, then another whoosh of a couple three pounds or so, then another stall. I have no idea why my body did that but that's how it went for me. Maybe your body works kind of like that too? It sounds like you are doing great - I'm certain if you just stick with it, you will be slimmer by summer, and happier and healthier!
Wishing all of us here good luck on meeting our goals!
I know we will get there! And with every pound (or half a pound) gone, that's more health for us, and we are more comfortable with each pound lost.