Scared

I'm 8 weeks pregnant.. I had sex with my boyfriend about 300 this morning and I went to the bathroom immediately after and there was a little blood on the toilet tissue? It's kind of weird because ot wasnt red pr pink it was sort of like burnt Orange as in maybe it was old blood? But ive had sex with him pregnant before since I've found out I was expecting and thats never happened and the sex wasn't any different than it usually is.. I just posted for opinions I don't see my doctor for my first appointment until January 5th and I'm just a little worried. Also I've been to the bathroom 4 times since then and I haven't seen any traces of blood whatsoever...