Pregnancy confirm. Test always same lab!

Hello doctors I have a question and please let me know if there is any chances of pregnancy... From last 1 year I continuously go for beta HCG test in every 2 month (because of doubt of pregnancy one time it's stuck in my mind so I go every time without making relation just after when my bf fingering me) in between whole year I don't make physical relation but my bf fingering me many times so I go for test again and again even my periods are came every month. Form last 1 year I go for test many times but result always remain same (<0.100) but in December when I go for test it comes (0.72) then January (0.32) and in February (.042) so these changes indicates any chances of pregnancy also my periods come every month on time even fingering occurs 2 or 3 times by my bf so can it cause pregnancy.    I attached my all one year reports pic here plzz tell me if their is chances of pregnancy or why value change I'f I go for test always same lab