Hello my dd 3.7 months has autism and she also developed appalling hayfever with a constantly streaming nose .She has been taking certified for this since Thursday . However it may be coincidence but since then she seems to have had a noticeable regression .her behaviour has become very unsettled and she has started opening and closing doors again repeatedly she is also saying no to everything I am aware this might be because of the illness but I wondered if anyone had any experience of the meds thanks