Have tried everything and still not pregnant!

Feeling defeated! We've been trying for years now and still no baby #2! We've had a couple of losses but haven't been pregnant now in over a year. I've had HSG test done to flush tubes and make sure they work (they're fine). Have ovulation tracking each month with my dr. Have taken medication to fix my high prolactin levels, BD on the right times and a fair amount of it during fertile week and still not falling pregnant!! I've got one son so I know my body can do it but it just isn't happening. I'm only 30, I don't understand why we don't get pregnant anymore 😣 I really don't want to do IVF. If everything is fine and all checked out, I cannot understand why we don't get pregnant...