Oh Miami, I know it's fucking awful, the whole thing, but you can't blame yourself. Do you know what it is in particular that makes you feel that way? Counselling, maybe first for you and then for both of you might be a really good, healing thing to do.
You might find a whole load of new complicated stuff crops up when you're TTC again. Last month for me was really unsettling. I know it turned out I was pregnant but my goodness I cried. Literally sobbed and howled down the phone to my Mum, and all over DH, just with the unsettledness and fear, and hope, and pain and uncertainty of the whole thing. That I'd never conceive again, that I would and would lose it (ha), that I'd have loss after loss (again, we'll wait and see on that one...), that our marriage will suffer, that DH doesn't care as much as me, what the fuck my life would look like without children, that I'd have children and it wouldn't be worth it as I'd be a crap parent (bit premature, admittedly), honestly, all sorts of stuff.
And I'm not telling you how to feel, sorry if it sounds that way. I'm also not saying I haven't blamed myself as well, but even if they find something "wrong" with either you or me, it means it's something they can fix, not that we're at fault.
I've had cramping but in the ovary areas, not the uterus Mulder Stinging could be an infection? Maybe give it a day and call the doc or the EPU. Can't be too careful.