I feel like the worst mom!

Things were going super well.  I usually don't have Scarlett at home with me for dinner.  Most nights I bring her to my parents' house, either so they can babysit while I tutor or go to the gym, or just so they can enjoy spending some time with her each night.  Once I go back to work, I will be picking Scarlett up from daycare and bringing her home for dinner so I'm letting my parents get as much time with her as possible.  Plus, it doesn't hurt that they live around the corner from me.
Tonight my mom was feeling sick so I decided to bring Scarlett home with me.  Usually I eat dinner once I put her to bed.  But I am tired of eating so late.  I had bought some fresh salmon today and I quickly popped that into the oven for us to share and I peeled and cubed a sweet potato to steam.  Scarlett was playing so nicely right beside the kitchen.  She had little containers and wooden spoons and lids all over the place and was having a ball.
The salmon was cooking, the sweet potatoes were steaming, and I was just cutting the kiwi for her dessert when she started to crawl towards me.  Scarlett grabbed onto my legs, and I was just bending down to lift her up - it's still a novelty that she can crawl at all, let alone to me as she just started a week or so ago - when she let go of my pants and slammed backwards down onto the tile floor.
OMGosh, I could hear her head hit that floor and see the shock register on her face.  She let out a scream and I picked her up, grabbed an ice pack from the freezer, and ran into the nearest room, sat on the floor and whipped out my breast.  She started nursing and I placed the ice pack on her head.  But I was panicking.
I called a friend who is a nurse.  She advised me to watch for any signs that things weren't right with Scarlett - throwing up, lethargic, and to wake her periodically throughout the night.
But Scarlett sat in her high chair and we both ate dinner together.  It was such a yummy dinner, and now that Scarlett feeds herself, I just had to place little amounts of fish and sweet potatoes on her tray and we ate together.  But she kept making a weird face and reaching back for her head, so it must have really hurt.
After dinner, she continued to seem fine.  She played nicely, she fought me when I tried to put her sleeper on (as usual), she had her breast milk, and we read books.  Then she went RIGHT DOWN for bed.  Lately she's been suffering from separation anxiety at night, so tonight it's a little weird for me that she went right to bed.
My place is a disaster.  I didn't want to leave her to go clean up.  I'll have to do that now.  And it's going to be a long night of setting my alarm, waking her, and then trying to get her back to sleep.  I guess it's good I'm still breastfeeding.  Thank goodness for breast milk - it's the instant solution to every problem.  Makes me want to reconsider T42 so soon as I'll have to wean her completely.
I was thinking already that I should eliminate one more feed, take her down to 3/day, as she'll need to be down to 2/day in one more month.  I thought I could give her cottage cheese or yogurt after her PM nap to replace the milk.  Then when cow's milk is introduced in one more month I'll use that after naps, if she'll take it.  But I have to get rid of the morning and night feeds soon too.  Then no more breastfeeding as a cure-all.
I just hope that Scarlett is okay.  That fall must have REALLY hurt.