Sore, itchy scalp- methotrexate?



I started on 15mg methotrexate just under 2 weeks ago and am starting to think my recent itchy and sore scalp could be a side effect.

I have a sensitive scalp anyway which is why I've not thought of it until now but it seems continuous. I'm due to increase my methotrexate tomorrow to 20mg and scared I could start to lose my hair or have increased discomfort. Is there anything anyone would advice?nice read coconut oil is good to sooth and wonder if antihistamines might help....or should I be speaking to my GP rather than self treating/assuming the reason.

Any advice or anyone who's had similar, I'd love to hear from you.

Thanks Amanda x