I don't know.. help??

I had unprotected sex the week of June 26th (my June period was the 16th-21st) we had it a few times that week.... fast forward to this week. I've been so moody, tired, I get nauseous, I've had light pressure in my abdomen and I've pooped way more than normal. Then yesterday (get ready for some TMI) I went pee wiped some brownish pink it was only when I peed then wiped. Never enough for a panty liner. This morning, I had poop pains and went and wiped then had small brownish red clump and more just brownish stuff. I've got light cramping again this morning. I just I don't know. I'm not sure what to make of it. I'm scared I'm over thinking, we want to get pregnant. So I don't any advice? Thoughts? Anything.....