what could this be?


I had two 5 day early blastocysts transferred on 22nd August. My test day is this Saturday 2nd September. I have no real symptoms as yet. I went to the toilet this afternoon and although there was no discharge when I wiped, there was this small amount in the toilet bowl (sorry for tmi). No blood in it (first photo). Now this evening I have a slight brown lump of discharge (second photo) and this evening I also had an ache at the bottom of my back on the left side. Any ideas what this could be? I am taking lubion progesterone injections so my mind is thinking it could be just a side effect :(

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