1st pregnancy 7 weeks w/ TWINS!

my fiance and I found out Thursday that I was pregnant with twins! What a shock yet amazing feeling, and we have had so much fun telling our friends and families that there are 2. Today is Saturday and this morning I went to the bathroom and there was some redish/brownish blood and 3 or 4 very small (smaller than a pea) blood clots I felt my heart drop. I've been trying to relax and I haven't had much bleeding at all just very light spotting if anything. I'm trying to tell myself that 1 if I am MC there is nothing I can do about it and also that when I had the u/s done Thursday afternoon they did a intravaginal one so maybe it just irritated my cervix and that's what the blood/clots are from. Has anybody else experienced this?