If I saw BH for some marital issues a while back, will it affect my class 4 flight physical?

If everything here is as you said - and you have said everything here (i.e. there is not more to the story) you SHOULD be good to go. You essentially got marriage counseling, which is fine. With no diagnosis and no stated condition, there is no reason to hold your packet up.

All of that is in a perfect world, of course. I cannot guarantee that you are good to go - I am not the one reviewing your packet. And if your provider at the time DID note a condition, or even a potential condition or behavioral issue (notation of which you may or may not know about), then red flags could go up.

If Aviation Psych said she is taking care of it, just standby. If she gave your packet back to you for BH eval, then submit to BH ASAP - and then stand by.

The only person that can give you a warm and fuzzy is the aviation psychiatrist that has been consulted. Two things happened here, the provider involved with your process read something in your BH file that concerned them or they did not open it at all. I would be inclined to think something concerned them as any of us with a need to know can get access to BH records. Best advice is do not disclose anything else on here and wait for their review. I know this is not the reassuring answer you are looking for but it is reality.