Can too much 'BDing' be a bad thing?

I had a MC last month but desperately want to be pregnant again! I'm coming up to my most fertile days, glow said my fertile period started yesterday, me and my OH had sex last night.. But I've heard that sometimes too much sex can be bad as it makes the sperm 'weaker' but at the same time, you want to do it regularly enough so it's fresh sperm. What are people's views on this? I just want to make my chances of getting pregnant the best they can be, but don't want to do anything 'wrong' as such!! All your help and experiences would be greatly appreciated! (I have added a picture of my Calender, if you could comment in your opinion the days you would BD it would be great!!) thanks in advance ladies, baby dust to you all!!! ☺️