Pregnant???

Hello, Let me give you some background. I am 28, have endometriosis and have been trying to conceive for about 5 months now. My cycle is usually very normal (28 days). I bought a clear blue easy fertility monitor and had intercourse on day 10, 12, 14, and 16. Around day 22 I started spotting. It was different type of spotting. It was brown at first and then light pink (not to be gross but it was like mucus). It only occured when I wiped after going to the bathroom. It lasted on and off for about 3 days. I thought for sure it was implantation bleeding because I have never experienced spotting like that. On day 24 (4 days before my period is due) I took a home preg test and it came out neg. I waited 2 more days day 26 (today) and took another first response test, it was negative again. I am extremely tired but I get that way before starting my AF. I am having light aching and slight cramping today. I am just wondering if I am, if I should have gotten a positive already using the first response tests if it was implantation bleeding. I don't want to get excited, but it's hard not to. I just want it so bad that I think I might be reading more into things but I am hoping that the tests just aren't showing me a positive yet. Any experiences similar out there?