Where Did Hope Go? Update on FET

I'm not doing any work anyway, so may as well post an update on my fertility saga here.

Today I had another ultrasound to see if we can try to get me pregnant again- when I think of the most recent series of event, I include the negative pregnancy test in March after a frozen embryo transfer with a five day delay due to lining problems, then a cancelled cycle in May when my uterine lining absolutely didn't respond to medications, then three weeks of antibiotics, and now ten days of using the estrogen patches instead of pills.

I went in today fully expecting no growth again, and for today to be the end of medications, ultrasounds, and for us to be a single-child family. Well, my lining DID grow. Not a stellar result, but enough to do a few more days of meds and check again on Tuesday.

So you'd think I'd be happy, right? Instead I am.. tired. Tired of all this crap. It's been months and months of ups and downs- mostly downs- and both of us are actually really coming around to the idea of stopping treatment. Having one child is sounding very appealing to me. I was an anxious pregnant lady, and the newborn days were not kind to me. Financially we can afford a second, but it will be tough, and we can afford some awesome vacations with our only kid and to retire much earlier with only one- I've been checking out Alaska trips with the refund we'll get if we quit treatment. And a few days ago I held my friend's newborn and I was happy to cuddle her.. and then equally happy to hand her back.

So, what does this mean? I feel like I have to at least continue meds till Tuesday and then see what my lining is like, but I'm trying to figure out what is going on with me, who so desperately wanted another child just a month ago. Am I insulating myself from hope by blocking all positive thinking? Or did I really just change my mind? How does one decide to have or not have a second child? Will I regret not moving forward, if we decide to stop, because the infant days are short and a family is for life? I am on a waiting list for a therapist because I honestly cannot figure out what I want. It's very confusing. I endured years of infertility and surgery and treatment to have my now-28 month old, and cried my heart out when the March pregnancy test was negative, so why am I so ambivalent now? WTF is wrong with me?