Second thoughts

Ive had in my mind for months going back nearly to August that inwanted to split from my husband. We grew apart and theres no support from hom comminication broke down and we both went about our lives in our own wee bubble. Ive posted before about lack of support etc. But now ive actually told him i want a seperation on a trial basis im having doubts. I do keep thinking back to how miserable i was before and the doubts disappear but i see his face and think hpw badly ive hurt him he wanted to try and fix things but i think its going to take a lot of work and still want the break but im stil lstruggling with the decision.
Im not the only one who has doubts after seperating am i ?