This! but they should've giving you a 24h number for questions like this and poss. urgent questions about baby. Can also contact your district nurse, hope you are alright!xMy MW said that small blood clots are quite normal...but if you get any that are bigger than a 50p, to get in touch with her asap - just so you can get checked over for peace of mind.
I used to find as well that if I over exerted myself in the early days, my bleeding would get heavier with bigger clots...try and take it easy xx