Congrats on your pregnancy!! It is possible that your dd would wean but unlikely right away since she is nursing so frequently and is quite attached to it. In fact the drop in milk may be minor as she is also nursing for other reasons such as being close to you and for comfort. She may continue to nurse throughout your pregnancy and beyond. I suggest getting a copy of "Adventures in Tandem Nursing" by Hillary Flowers and taking it day by day. You can't know now how you will feel in 6 months and although your dd nurses a lot now her frequency may change and that could be age-related more than pregnancy related too. My dd was 3 1/2 when I got pregnant and nursed several times a day. I am 15 weeks now - we have mutually cut down her nursings to bedtime only (mostly because I am getting uncomfortable) and she doesn't resist which makes me feel like she is ready to nurse less often. Enjoy your dd and your nursing relationship and try not to worry about changes too much right away as things usually will happen gradually.