When to test?

Emma • I`m a 19 year old nursing student married to the love of my life ttc our rainbow baby!! :)
So I use 2 ovulation Calender's and mydays said I'm 10dpo and glow says I'm 5dpo. I'm nauseous, my breasts are tender, I'm constantly exhausted, and I'm crying over EVERYTHING. I'd like to think I'm pregnant I just don't want to get my hopes up just to be let down. Thoughts?