5 days late negative tests

[SPBennet123]

Hi I am new to this so I hope it goes well. I usually have a 26 day cycle on time but I am 5 days late and still getting negative tests. I've tried first response and clear blue. I had what seemed like implanting symptoms last week. ttc and ovulation dates were spot on. I felt pregnancy symptoms during the first week but not so much now, I've just ballooned in weight. I am in a same sex relationship and used a friend donor at home. I am hopeing to hear from other people who have been through the same, but all advice is welcome from anyone.