My period was supposed to start January 26, it is now January 29th.(4 days late) I haven't started my period and I am usually always start right on the dot. I have had head aches, nausea, heart burn, cramps, and tired, now I have this brownish like discharge only when I wipe. I have taken HPT and they give negative answers. Has this happened to anyone before? I have a blood test scheduled for Friday the 1st of February.

Its great youv have a blood test. I only spotted brown with my first pregnancy after I missed my period and at first had a negative result but I retook the test a week later and it was positive... the blood test will tell you for sure!

It is far to early to do a urine test, you need to be at least 2 week late to do a urine test, so yes it would be negative at this point.

While of course you can do a blood test, really waiting a few more weeks may well be the best thing.