Opinions please

Hi all, I’m 6dpo and for the last 2/3 days I’ve woken up feeling ‘off colour’. My lower groin/tummy area feels rock hard and crappy, I’m having constant heavy CM. I go light headed through out the days and last night was practically a insomniac. I am going toilet a lot more than usual. I did a First response test this morning which was a negative, but I’m certain just too early to pick any hormone up. What do you all think? I was wondering if it were a virus or infection and go Drs but I’m never poorly!