Sore inner thigh musles

So it's almost been a month after the birth of Leah and my inner thigh musles are still really sore, quite high up. They are much worse when and after I go walking. Often I find I need to support myslef when I stand up as it feels like I'm not able to support myself.
i asked my MW last week about it and she doesn't understand why I would be so sore still and that i should check it out with GP at 6 weeks.

Has anyone else had they same after birth? how long did it last for you? I'm desperate to get out and do some proper exercise soon...