Faint +ve on 7th day negative on 9th day

Hello all, its me again. May lpd was 20th may on 27th I did HSG test to check my tubes as i am planning for pregnancy. Tests are normal my both tubes are working fine. This month I am late by 9days. On 7th day i did hpt and it was showing faint pink line which i suppose is a positive result, on the same day I did beta hcg test it was negative. today again I did hpt it was showing negative. I dont have any pregnancy symptoms nor periods symptoms. What should I do? i am really confused. This is the first time my periods are late by 8-9days. Also my thyroid levels are absolutely normal. No sudden Weight gain, no pcos no stress nothing. I am 34yrs old female with active lifestyle. What could be the reason for such weird situation? Should I wait to get periods naturally or should I take medication to get my periods? Plzzz help!!!!!