Please help

I feel embarrassed for admitting it, but it seems(more often lately) that I end up going into a panic when I feel calm. I had a panic attack while driving home from picking my daughter up from school. The drive is maybe a 10 minute drive and nothing was wrong. I feel like I'm worrying about something but unsure of what and I can't stop fidgeting. I tried to reach out to a friend, but I get worried they won't understand what I'm trying to say. I've been staying home a lot lately and I can't even explain to my husband how I feel or what brought me to tears because I'm so embarrassed and sometimes not exactly sure what brings on the panic attacks. I feel like I'm going insane. I've tried to meditate but when I feel like I'm getting too calm, I snap out of it and I end up making myself feel worse. Does anyone else ever feel like this? I can't be the only one, right?