Hey T.!
I have been here done this! The fact that you are even the slightest interested in someone else, no matter who it is, is a big red flag you should address! If you are having feelings for other people this means that you have lost most of your feelings for your husband.
Leave the OB/GYN to the side, I know from experience that the first person you see after divorice or martial issues seems like the most sexy interesting and nicest guy you have ever met in your entire life! Its of course not really true, everyone has quirks and issues. Remember that!
First off is to deal with the issue at hand and your current relationship with your husband. I see in your profile that you have two small children. Small children cause lots of messes and usually put a damper on the love life! I also see that you are fairly young, I was also 22 and newly married with two kids 2 years apart. It would be interesting to know how long you have been married and how old your husband is.
I would suggest you get someone in the family to baby sit for the night, send the babies away and take some time to really discuss things with your husband. Try to keep everything on yourself, avoid words like always never and avoid saying things like "you did this". Instead discuss how YOU, T., feels. Give specific examples of things said or done that made you feel as though you were being treated like a child. Talk about how you feel and tell him that you want to work together to get your marriage back on track. Some people like to write this down and read it as it helps keep it focused on and track.
His responses will tell you what needs to happen.
1) If he becomes violent for example then join your kids at your relatives house!
2) If he crys or withdraws from the conversation then you may have a depressed or overwhelmed husband on your hands, come up with a plan on how to address the things in his life that really stress him out or make him depressed. Knowing is the key! Some compromises may need to be made to help him through may help the situation and get things back on track in a couple months.
3) He may be surprised to know that you are unhappy or that he is contributing to it, sometimes its a big adjustment for everyone with marriage and kids so early! I found that instant family is alot for guys and it takes a while for it to sink in. If this is the case then my suggestion is that you need to establish a regular date night, have conversations and maybe make "key phrases" that when said will remind the other they are ticking you off or being hurtful.
If this doesn't work for you or you think the relationship is beyond this sort of conversation you can consider marriage counseling (sometimes pasters or priests will do this for free or get paid therapy).
If you decide to end your relationship with your husband I would suggest being on your own for around a year before entering any sort of serious relationship. Having independance and a clear head can help avoid entering the same type of relationship again.
Good luck!