Pregnant and confused...?

I left my alcoholic, verbally abusive husband of 7 years about three months ago. The main reason I was able to resist his apologies and begging to get me back was this other guy I started to see. The other man is sweet, sensitive, and pretty much perfect for me. We found out I was pregnant about two weeks ago. It is definitely unplanned. I'm seven weeks along now. I recently started having mixed feelings about my husband (we have started the divorce process). I know there's no way I can get back with him. I'm carrying another mans baby. I'm missing the good things about him and feeling guilty for leaving him. I know I gave him several chances to quit drinking and treat me right. It's just so much change so fast. Is it unreasonable to ask my new man for some time apart? Just to get my thoughts straight. I know it will scare him and make him worry. Please no rude or irrelevent answers. Thanks