Well, they need to be treated independently, but yes there is lines against them, and they're not too challenging. I'll adress them from most to least important imo, as far as repertoire building goes:
1.d4 Nf3 2.e3, this is likely to head either into a colle/stonewall type thing, or if white plays c4 in the next couple of moves into a weak QG position. SInce you play Benoni and QGD, I would play either 2..d5 or 2..c5 here, then just develop pieces normally and you should be equal.
1.d4 Nf6 2.Nc3, this is slightly trickier, the problem is that if you play a move such as 2..e6 white play play 3.e4 when you are probably going into a french, which may be outside your repertoire. If you play pirc, you can play d6, if caro kann you can probs play c6, and if french e6, otherwise to keep it in d4 you will need to play 2..d5, you can look up theory here under veresov, black has plenty of ways to equalise.
1.d4 Nf6 2.nf3. This is the best out of the options, because white may still play 3.c4 having avoided some lines such as albin and budapest. For benoni you hould continue with 2..c5, or QGD just 2..d5, when play will probably either reach the mainlines if c4 is played, or will go into one of the e3 lines such as colle or stonewall.
I like playing black but i am facing problems while playing with white's d4. This is what happens...
1.d4,Nf6 2.Nf3
or
1.d4,Nf6 2.e3
or
1.d4,Nf6 2.Nc3
I not sure how to proceed further as black when white doesnt play the main line... hence,I also avoid all chess openinings and just rely on tactics like pining, but this takes a lot of time and i end up losing the blitz matches because of time constraint.
Is there any openeing against such moves by white, all i know is the benoni and QG declined line.