I'm a level 4 medic and almost level 5 and I can guarantee you that when I play medic, I consider healing to be my first job. I consider my second job to pick off weaker zeds like clots, crawlers, stalkers, etc. I play defensively and usually only attack things that are a threat to the team.
I try to keep my entire team at full health. It helps if the team is in some sort of coherent formation where the medic has access to quickly heal them.
I've tried telling people not to self-heal if I'm around. I've nicely explained why it's far more efficient for them to let me heal them and for them to heal me if I need it. Then they still self-heal anyway and watch me run up, stab them ineffectually with a needle and stare at them and then they just run off, get hit, and do it all over again a few minutes later.
I don't get it--self-heals count toward no perk, they take twice as long to recover from, and they're very weak compared to medic heals, yet people seem to prefer them for some reason, even if a medic is running at them full speed with the syringe out.
I guess this is because in pubs, most medics don't heal and people just aren't used to letting medics heal them.
Most people seem to think that healing is something done at the trader between waves only.
Thank you for not being one of many people who don't turn into Zerkers at level 5 med.
The same thing happens to me many.... MANY times whenever I try heal the team.