Well, you're 7 weeks, so you're heading toward the point where it sounds like rubella becomes less of a threat soon, so that's good
Yeah, call your midwife/dr and ask them what they recommend for you to keep your baby safe - if you need to partially hibernate for a few weeks, well, so be it (sure is the weather for hibernating!)
Because so many people are immunised against rubella these days, it's pretty rare, but call your healthcare provider and see what they think you should do - it will ease your mind to have a plan of action I reckon
All the best!