These are estrogenic side effects happening to you here my friend - bloating and water retention. You should be using an Ai from the first day of the cycle. If you used Aromasin, these issues would not take place. Start your Aromasin ASAP at 10 mgs EOD. Also, it would be a good idea to add some N2Guard to the cycle. Although it is initially a liver protecting supplement, it can also considerably reduce the bloating.