IUI and the TWW what are your symptoms?!

This is my first <a href="https://glowing.com/glow-fertility-program">IUI</a>. TCC for almost 4 years one miscarriage and one chemical. Husband has low motility semen analysis came back borderline I have MTHFR gene mutation my body does not absorb folic acid correctly. I always notice lower back pains throughout my cycle a lot of times bad enough I lay on a heating pad. I have had every test done but the surgery they go in and checks for scare tissue and endometriosis. But I often wonder if I should get procedure because of the years of ttc and the lower back pain. 
Had the <a href="https://glowing.com/glow-fertility-program">IUI</a> 10/1 Same day as positive LH surge
Had sex 10/3
Lower back pain started 10/7 period isn't due until 10/16 I have noticed to that my nips have been pretty sore to touch but this has happened in previous cycles before period is due.