Im going nuts! I had a period 3-4-18 to 3-7-18. Ovulated on 3-18-18. (Took a ovulation test) well the last 3 days ive had headaches, lower pelvic cramps, a severe back ache. Im extremely tired. My boobs feel really heavy and a little sore. So today i took another ovulation test i got two lines?(4 dpo) but a negative pg test. Whats going on???