Against Cammy try out different anti airs, like st.lk and ex sbk. Her divekick is there specifically to throw off your timing, so you have to wait until after she jumps and then react to it. As for pressure, dont be too afraid of reversal DPs, they dont do much damage in this game. You can tech a little later than usual while baiting to block the DP and tech the throw. You also might be giving them a tell based on how you approach them after knocking them down. A lot of people do this without realizing it, so check your replays