Ah ok. Yes an SCH is a sub chorionic hemorrhage. Maybe more or less the same thing looking online, although perhaps the location is slightly different?
Any hoo, with the sch I have certainly been advised pelvic rest (no heavy lifting, no sex or orgasms via any means) while it is there.
Mine was diagnosed at 11+6 and is still there at 26 weeks, but mine is quite big (started at 5.7cm x5.1cm x 3cm approx). It also appeared quite late in the first trimester, so has hung around throughout the second trimester... So no fun for me!
SCH's are pretty individual in how they progress... Some small ones arrive early first trimester and disappear fairly quickly, some can take til 20 weeks to go and some (like mine) Han around for a long time.
My big issue was that mine did hemorrhage and I gushed blood everywhere which is how I found out about it. It bled for 5-6 weeks and stopped bleeding at about 17 weeks. Now it is considered "inactive" because the blood is clotted, and is less of a threat at this stage (although does pose some risk of premature labour compared to if it was gone).
So, if your Extra chorionic hemorrhage is similar I nature, is a case of watch and wait, and take it easy.
Also, drinking water lots is apparently good for preventing uterine contractions, which is another thing that can cause the hemorrhage to burst/bleed.
Hope this helps.