Wondering :)??

Loni • TTC first baby cycle #5. SO & I have been together for 10yrs! I couldn`t be happier, I`m so ready to start our family.
Should I test or wait? I'm due for af on 5/11 but my last af was very light I'm not sure if it was even af but it lasted 5 days. Anyway my stomach feels very tight/hard and I've been owing a lot more. What would you do? I just don't wanna waste the test :)