So sick of being disappointed...

How can I go from 12 DPO with the faintest positive at 9 AM to doubled over with the worst cramps of my life at 6 PM and bleeding 2 days early? So stupid for thinking this cycle would be different. So many abnormal symptoms this month and my first super positive opk. I'm not even telling my hubby about my symptoms next month. It's bad enough for me to be crushed but to get his hopes up for nothing is just cruel. Ugh, so discouraged. And so much pain right now which just makes everything worse.