Talk to Andrologist on Trouble Sleeping After Taking Sertex Tablet

I went to Dr. Harris Burki for sexual timing issue. He has prescribed me Sertex tablet 5mg along with some other tablets (attached). But the problem is that I am having trouble sleeping and I can only sleep for 3-4 hours at night since last 2 days after taking these medicines. Doctor has prescribed 1.5 tablets per day of Sertex for 3 days and 2 tablets per day afterwards for 2 weeks. Please guide what should I do? Shall I stop taking this medicine beacause I am feeling headache due to less sleep time. Will this sleeping discomfort continue? Is there any medicine that I can take to counter the sleeping trouble side effect of Sertex? Please guide what Should I do?