Help to identify 2 whole specimens.... How to preserve?

I am still having specimens being expelled during my menstrual cycle. Over the past 5 months or so they went from looking like flukes to this pronged type. I had an ultrasound done which did not provide much help.

I have contact the parasite lab in Arizona to find out about submitting these samples for diagnosis. I have posted 2 pics from last night and this morning which are thin and long. The larger one is from last year maybe around October but I'm pretty sure it is the same thing. If I can capture the ultrasound pic I will post as well.

Now that i have these two new samples I may try to approach my gyn about the issue but after my last dr experience idk if it will do any good.

Anyways do any of you know what this may be? Also what is the best way to preserve? Ones drying or freezing help in preserving these?

Thanks