I have two questions.. Can anyone please enlighten me..?

All my life, ive never tried any opks or tracking methods to see if i ovulate.. But, after nearly a yr of TTC, i thought of starting using OPKs strips to track ovulation. When and how should i use them?

Another question, isit true that if i and my hub doesnt cum at the same time, it'll be hard for the sperms to reach deeper etc to my eggs..? Usually, he makes me cum first and then he will. And, im the sort that finds it hard to cum more than once. Is that a problem? Should i be concern abt it?