All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
First of all, we advise you to avoid such matters that you were doing in Ramadan with your husband and avoid foreplay and all what may stir your desire while fasting.
However, it appears that you are not obligated to make up those days because the white sticky liquid that comes out during foreplay and at the beginning of sexual desire is called Mathy, and if it comes out it does not invalidate fasting according to the Fatwa that we adopt here in Islamweb. For more benefit, please refer to Fataawa 84129 and 83622.
Moreover, if we presume that these are nothing but vaginal discharges because of pregnancy, then this does not invalidate fasting according to the agreement of the scholars .
Allaah Knows best.