Uy, been there! Pag umuubo ka talaga, ang tension sa abs at puson mo ay nakakasakit especially pagka-pregnant dahil stretched na ang lahat, pero kung lumalabas naman in a few minutes, siguro yan lang yung muscle strain from coughing, lalo na since may sipon ka rin ngayon. Still, 20 weeks at may persistent cough, mas better check with your OB lang para ma-rule out anything serious at ma-confirm na safe lang talaga, kasi gusto natin bawat ache mo during pregnancy ay alam natin ano yan, di ba? Take care, mama!