I don't know off the top of my head Batman, but this seems like a common situation. I get quite a few contacts, and numbers, but rarely does it steamroll into a good pace convo and a date, and even when it has for me it isn't always a good 'click'. Not to go on a tangent though..
There could of course be a number of options why she went cold, as you mentioned. But since you deleted her number than pretty much said 'adios' and she replied but kind of ambiguously, u can still reel her back in I'd say. If you had a good 'click' with her before.
Just say hey well I lost your number (if u want makeup whatever reason) and say well hey send it again and we can chat about a time to setup a meetup *add in whatever inside jokes u may have, commonalities, etc.
You kind of disqualified yourself so that's ok, it puts a little bump in the road which is cool, if she responds great, if not oh well right?
I also like just calling a girl rather than texting.. it puts a familiarity to your name and shows u won't be weird or awkward in a real convo. When u move from email to texting, ur still kind of like 'silent partners' or 'text buddies' which makes it easier to drift apart- because you have no vocal or physical connection, it is kind of subhuman in a way lol.
Just to throw that in..
Hope that helps bro good luck!