Clear (watery) stretchy discharge while on my period

Hi guys! So I started taking the pill on the 26th of May (so last month) and I had my period for 14 days, which never happened to me. I talked to my doctor and was told it was normal since it is my first time on birth control. I finished taking my pill a few days ago (I take it for 21 days and then I have to stop for 7) and my period came today, meaning I only had 9 days between my periods. Now the thing is, I'm having a lot of clear watery and very stretchy discharge while I'm on my period. Is it normal to have such a clear discharge (it literally has absolutely no colour, it's completely clear) while I'm on my period?