Am i pregnant?

I havent had a cycle in 33days i took a clearblue digital test last week and it came back not pregnant i took one Saturday morning and it also came back not pregnant!! Me and my so are not ttc but aren't completely against the idea but i was told that it would be hard for me to concieve and carry a child full term because of the shape of my uterus so i am very worried and or excited. I am graduating moving in with my so and getting a new job maybe i am just stressed? ?. Any suggestions? Has this happened to any one before?