Estrogen To Prevent Spotting From Depo-provera Shot?

I have heard that estrogen can be prescribed if you are experiencing spotting while taking the depo shot. I just had my second shot and am still experiencing the spotting! It started a lot sooner than it did the first time i got the shot. My doctor (family and my gyno) both say to just ignore the spotting. Which is okay when it is not heavy, but I went on the depo shot because a friend had suggested it to me. She said she experienced bleeding after the shot and was prescribed estrogen for it. She took it for 3 days and her periods and spotting stopped completely.

Now, my doctors will not prescribe me anything. My family doctor said he has never heard of this, and my gyno (which is the same doctor who prescribed her the estrogen) keeps saying ignore it. I went on my own with an old prescription of birth control pills and picked up a pack hoping it will work. I plan to take it today, however, if it does not work would one suggest picking up a OTC estrogen - if one exists? I'm in Canada. My friend says to try a new doctor, but I have been to many and another is just too much.

Originally my gyno was suggesting the IUD and with the horror stories I have heard I just wasn't interested which is why I went with the shot. The original BC pill had stopped working for me as spotting would occur (after 1 year or so) no matter which brand I would switch to.

I appreciate the help as I am quite concerned and just want the bleeding to stop at this point... My body now gives me no warning signs that bleeding will occur.