TTC 4 years.. just found out i have...

One blocked Fallopian tube.. The other one is great, but I’ve only gotten pregnant once in 4 years and miscarried at 8 weeks. I already had an ultrasound And bloodwork done which came out fine, but if my other tube is working fine why am I still struggling to conceive as if both were blocked? I’m only 24 years old.. my s/o hasn’t gotten checked yet.. I’m so confused ☹️