Practice freestyle and menstruate period starts

I made some progress in my free style in sense of hand movement. I asked instructor to watch my free style, and she said my movement is sort of less of smoothness. Is it because I use front cross crawl which people use in long distance swim. The hand movement starts only when the other hand catch the hand in the front above head. I will ask her about it tomorrow.
[check the term, it is: Front quadrant swimming, it means The stroking arm is still in front when the recovering arm is about to enter the water in front crawl, here is an example.]

I prayed for my period starting during the weekend and with the writing exam, I can have 3-4 days rests. But unfortunately, it starts today right after class. I never swim during my period, and really doubt I can do it. I will try to see what happens tomorrow.