waiting and wishing

my hubby and i have been ttc for about a year now. over the past year i have been struggling with an ulcer and being anemic, im sure this has been affecting our ability to conceive. well i have been healthy now (no ulcer and no longer anemic) for about 2 months. i haven't had my period since 4-17-09. i usually have pretty irregular cycles, sometimes 33 days up to about 45 days... well about 3 weeks or so ago i just felt like i was pregnant, i started feeling nausea , dizzy, abdomen cramps and really tired....(which are also symptoms of an ulcer by the way. could it be my ulcer acting up again after being healthy for 2 months?) my average cycle is 40 days so i took a preg test and it was neg, i waited until CD 50 and took another test, also came back negative. now im on CD 52 and still no AF....i still "feel" like im preg. Ive never gone this long without AF but still neg preg tests? i desperately want to have a baby...any advise??