Serious question.

La

My period has been really off since the last one. The last was old blood and no cramps. it was also later than normal. This is period so far is no blood and all cramps. I have some creamy discharge that is a little red but nothing like a period. My doc just did a pregnancy test it was neg. I have had sex since then but I was less than a week away from my period. So what the fuck is going on? I am freaking out because they just keep getting weirder. I am Trinessa and I have been on it for 2 years or more.