Desperate and looking for help!

Kate
This is different for me to ask for advice/help from complete strangers about something so personal but I am desperate. 
 I have wanted to have a baby SO badly my whole life but lately it's increased tenfold! I am 31 y/o and have been with my bf for 5 years. 
  When I was a freshman in hs (2000); I was diagnosed with endometriosis and then in 2007 I had to have colposcopy done. That resulted nothing further. I had the mirena IUD for 5 years and had it removed on 5/1/14, haven't been on bc since. 
  I am doing everything under the sun I can think of or hear about to try increasing my odds of getting a bfp! My cycles have never been regular some months I get two af and some I get the typical one (range in cycles from 3-7 days). 
  I have been taking temp/weight, and checking cm everyday, taking prenatal vitamins and folic acid/dha, I don't smoke and only drink a glass or two of wine on occasion. I don't have much money to use opk month after month (especially with my irregular cycles making it difficult to know when I am ovulating). Oh yeah, I also have a uterus that is towards my back angled backwards (just in case that's important). 
  What else should I be doing or can I do to help increase my odds of that one or two days to conceive? Any help or suggestions would be appreciated. God bless!