I'm on lexapro and at first it was hard to get the big O, but seems ok now.
I took Zoloft a few years ago. I agree Zoloft made things worse. Couldn't get the big o at all. It makes you where you just don't care.
A sex therapist might be a good idea. I agree about the big meals. We would go eat Mexican food a few times a week. Get all filled up and then she'd want some sex... I just can't being that full.
I really don't consider my wife a nag, but I did feel pressure about the sex. For some reason, that's a turn off.