(((HUGS))) The anticipation of someone else watching your LO is stressful. You will never (well maybe not never....) have a perfect EASY and the reality is when someone else is watching your LO, she will probably get OT. My LO was OT every day I worked, but we survived. You DO get through. I kept trying to get it perfect and it was just impossible.
What time was her bedtime? If she is waking at 5 and bedtime was 6 ish, it is not an EW. KWIM? That said, if she is waking at 5 and there is any discomfort, it is hard to get them back to sleep Have you tried applying teething gel when she wakes? My LO is teething and this seems to help. If she won't go back to sleep, then the 5 am wake up counts towards the 1st A.