I feel like sex every other day isn't enough!

Does your so have a normal sperm count? If so you can have sex daily. I say have sex when you want and don't stress it to the point we're it's a chore. Healthy sperm can stay in the vagina up to 5 days in the right conditions.

every other day is perfect. the months (over a year) that we did daily nothing happened, first month we did every other day, i got pregnant.

I've heard that every other day is best because it allows time for sperm to build up

Everyday is unnecessary. It can also be stressful to pressure yourself or your patient to do this when the intention is to TTC. Sperm lives for days inside your body anyway and egg 12-24 hours . 

imo every day is better because if there are a lot of sperm hanging out near your ovaries before you ovulate, conception is more likely. they live up to 5 days but the more there are, the better the chances. take care.