Unprotected sex for 6years

Tara 🍼✨ • Endo sufferer
Cut a long story short...I'm 30 husbands 37. Husband has 2 kids from previous relationship (aged 19 and 16) I have 2 kids from previous (aged 12 and 6) Been together 6 years and never used protection. Got diagnosed with endometriosis April 2013 had a lap sept 2013 and the removed cysts from left ovary and endo tissue. Been told I can have hysterectomy but we want to try and have a baby together first. Husband is having a sperm test soon and I know deep in my heart there must be something wrong but I'm now scared my endo is coming back. Has anyone got a similar story and have gotten there bfp?? Thanks