Ok last month my period was different instead of red it was redish brown. I think I'm late its usually here by now. So I figured have sex and it would force it to start. A light pink came out and immedietly stopped. I took a pregnancy test and it was negative of course I didn't use first response I used a cheapy. Wats going on I've never missed a period. Not even if I was stressed

I think that I would advise you to contact your Dr. There are probably different circumstances as to why your experiencing the change in cycle. Not all have to be bad. It could be weather, weight, diet. However your Dr. or even the nurse line could advise you best. Take care of yourself.

A change in my cycle. What changes.

Ok last month my period was different instead of red it was redish brown. i think im late its usually here by now. so i figured have sex and it would force it to start. a light pink came out and immedietly stoped. i took a pregnancy test and it was negitive of course i didnt use first responce i used a cheapy. wats going on ive never missed a period. not even if i was stressed

First of all, sex does not force your period. It could cause spotting (probably the pink you noticed), but if your actual period starts after sex, it's a coincidence.

Reddish/brown usually indicates "old blood" your body is flushing out. That's fairly common.

You think you're late? When did your last period start?

a change in my cycle. wat changes.
Your cycle is going to be every certain number of days. You stated that it was late. That is a change in your cycle.