Help!

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Can anybody relate or give me some advice or insight into their experiences? We've been TTC forever...I got a super positive ovulation test 2 days before my missed period (about a week ago). I am now 5 days late. All my pregnancy tests are negative...but today I thought I saw a faint faint line if I turned it a certain way in certain light...but am definitely second guessing that and I probably just have line eyes! I am very constipated...more than I have ever been in my life. I cramped really bad two nights ago...thought it was my period finally coming..but nothing. I feel like I am going crazy. I have an appt with my doctor this coming week just to make sure....but it's definitely gonna drive me crazy until then. Any help?