I know I shouldn't expect too much from my body while I am carrying my fourth child... but OMG the least it could do is hold my pee in while I am coughing

I have got the most awful chesty cough. Really, really coughing hard - so much so my sides hurt and it is making me retch at its worst. The worst part of it all is the little leak
when I'm coughing hardest. I worked really hard on my core strength and pelvic floor after the other babies so I can't really believe this is happening :(
Please tell me I'm not the only one.............