TTC after TFMR

My husband and I are TTC this month for the first time after our TFMR about 2 months ago for severe non immune fetal hydrops at 21 weeks of our sweet boy. We received all results and his case is idiopathic-all testing was negative. Did anyone else TFMR for similar reasons? We were told by our genetic counselor that to the best of medical knowledge this was not genetically inherited as all testing was negative, but cannot say with certainty as our son could have inherited a condition that has not yet been discovered by science. Thus they quoted us “up to 25% chance of this happening again”, though told us it would be very unlikely and realistically the likelihood would be much lower. We want a living child so badly and miss our unborn son more than we can describe. Has anyone dealt with a similar circumstance? We are full of anxiety of having this happen again but the want for a living child outweighs this fear.