Sex pain

I had sex this past thursday and the mans penis is 8 in. I didn’t have pain until 2 days after and my discharge was pinkish. Now today it was more blood like. I’m also having stomach cramps, but it feels more like air was pushed in my stomach. There was definitely air when we did doggy, but could my manifestations of blood and gassy stomach cramps be a result of this? Or could it be something else?

I have never bled after sex before… so kinda worried.

Also it was a bit dry one of the times we did, which also could have irritated my vagina.

But IDK, looking for some help!!!