Valerian/hops/lemon balm stopped working help?

have being taking valerina contains the above for last 3 months now its stopped working if anyhting think it wakes me up was taking quite high dose. last week taken hours to drop off and then only for short bursts thats with taking the valerina am exhausted. anything else i could try??? cant take melatonin as in uk and need something today am desperate as single mum with 3 kiddies