Late but negative preg test- please help!!!

Annie • Married 5 years & counting. Mama to a sweet boy and many 🌈's, baby #2 was a rough miscarriage as it was 7w6ds in and we had just days before seen our babes heartbeat
So I am now on day 35 out of a normal 32 day cycle.  Been thinking for a while things are different and maybe this month is the month but taken 3 different home tests the past 3 days all negative :(.  Have had change in sense of smell, change mood more than normal, breakouts more, light stomach cramps for over a week.  Can I be pregnant but have negative home tests??? Anyone had this before???