I think I'm cheating on my husband 😞

I'm married, been happily married for 2 years now. We've had a rough year. Ups and down not in our relationship but in life. I just met a girl... we haven't done anything, nor spoken about anything just regular stuff. But I feel these butterflies in my stomach, mind you I've been in a relationship with a women before (I'm a women) not sure if I'm bisexual, lesbian or what. I get so nervous when I'm around her and I'm always looking to see if she post anything on Facebook or if she likes my stuff, etc. Don't know how to take this. Is my relationship going down, or am I just confused because of all that's been going on in our life. My husband and I haven't had alone time, meaning just him an I. Please help and give me some type of advice...