I hope this is the right place to post this. Hoping for some friendly advice as really unsure what to do.
I have one DD who will be 4 in November. Thought she would be the only one as I was 41 and had low fertility (I knew from tests) although conceived her in fact without too much difficulty back in 2013.
Tried for another intermittently after that and had a missed miscarriage at 10 weeks in 2015 and then sadly a termination for Edwards syndrome in summer 2016 at 44. Was heartbroken, then keen to try again, but felt anxious that time was not on my side etc etc and quietly and sadly simply stopped trying. At all. Now I've just had sex exactly bang on the right time (a rare occurrence, sorry TMI) and although I got swept along with the fantasy of trying again, I woke up this morning cold with fear about being pregnant and risking miscarriage, abnormalities and even just having a baby st 46. My gut tells me it's too late. I would have dearly loved a sibling for DD, but I think I know that ship has sailed...
I've also had a bad year of health anxiety which is under control with CBT, but I wouldnt find pregnancy easy anxiety-wise.
Should I take the morning after pill?Or risk a healthy pregnancy? My gut says that won't happen. DH thinks the chance of conception is so low there's no point, but last pregnancy a year ago was after a very rare one off event just like this one.
I'm completely realistic that conception chances are extraordinarily slim at my age, so I understand my concerns may seem laughable! 
. I hope I haven't offended anyone who is trying hard in their 40s to conceive - I've been there just not sure I still am.
Does anyone also know if the morning after pill is safe at 45?