What to do??

So I never post in things like this but my husband and I have been trying to get pregnant for about 9 months now. We found out we were pregnant in January but I miscarried a week after we found out. We have been trying ever since and this week has been suuupeerr weird. I am NEVER late, 28 day cycle every time. I know my body pretty well, I typically cramp the day before I start, have headaches/backaches while on my period, and crave foods. Well I’m now three days late, I’ve taken a pregnancy test one day after my missed period because again I’m NEVER late and it was negative. This morning I had mild cramping and when I wiped there was a tiny amount of pinkish blood? I wouldn’t even call it blood because it was so watered down but no blood or cramps since. My breast are tender and I have been feeling mildly nauseous but nothing crazy. I plan on testing again if I don’t start but has anyone experienced this/have any suggestions?