At what point should an asthmatic go to the doctors with a dodgy chest?

[Handsup]

I've been fairly lucky over the past couple of years with my asthma due to the fact I seem to have good results from taking Symbicort, however I've had a virus for the past 5 days which seems to have improved but my chest feels rather clogged and I can't seem to cough any mucus up (it's just siting in my chest and I can't seem to exhale properly, although peak flow normal).
At what point should I go to the doctor to get it checked out? If I didn't have asthma I'd probably give it weeks but I just don't want this progressing into anything secondary yet with the same token I don't want to take antibiotics unnecessarily either.
Any advice please?

[koTinkaBell]

that the peak flow is normal is a good sign, but I'd go asap since breathing feels wrong. Get well soon.

[NewName123]

yes I would go and get checked