Afraid to Test!

Ok ladies! Take a look at my chart here and let me know what you think. This is month 3 TTC. I haven't used any OPKs (yet) and I think I may have ovulated a day later than Glow predicted. I took an HPT at 10dpo and got a BFN. CM has been creamy but almost non existent; only a little bit before bed. AF should be arriving tomorrow but I haven't had the regular symptoms: bloating, cramping. I have had pretty bad constipation the last 4 days, and mild breast tenderness started just last night. I am afraid to take another HPT because I don't want to be let down, so I thought I'd see what you all might have to say!