Symptoms/Uncomfortable pressure in butt area

Posted yesterday regarding a question, now posting again in regard to some symptoms I’ve been having. First off, my symptoms so far are constipation, but then random loose BM, loss of appetite, twinges at times in the stomach area and the weirdest one is pressure near my butt area. Has anyone experienced this in early pregnancy, I’m only around 3 weeks and this is my second try after a previous miscarriage in November of 2018.