I have pelvic pain, infertility for about a year and a half, amenorrhea x 3 months . 24yrs old, and 2 children already...please help?

A lot going on: There isn't "one" condition that explains all this at the same time, but pelvic pain + new infertility in a 24 y.o. endometriosis would be a big consideration. You'd need a thorough exam and interview with a doctor who is expert in this area to say for sure. 3 months without periods isn't to worry about, although it isn't normal. That question could be addressed with a visit too. Good wishes.