My mind feels chaotic

So I’ve been with the same man for almost 10 years, we have two beautiful kids together, married 6 of those years. I love my husband with my everything, and I don’t wanna loose him. I’m feeling “restless” I guess would be the right word, or at least close to it. The sex is great, our marriage is good (yes there are times I would like more help around the house and with the kids since we both work and I do one 24 hr shift and then 2 10-16 hour shifts, and I don’t always feel appreciated) we don’t fight hardly ever, like honestly I have one of the best relationships out of most of my friends, so why am I feeling restless? Anyone else ever feel this way? I’m 30 yrs old and have been with him since I was 21. I guess I sometimes feel like I want to be free again, do my own thing when I want, no responsibility every so often, but don’t want to loose what I have with my hubby. No shaming please. I’ve felt like this before but it’s lasted like a day or two. These feelings and thoughts are going on almost 3 wks now.