After having successfully raised seed capital you will find that there are times of elation and times of sheer terror.
This is perfectly normal. You are no longer just responsible for managing the funds that you have raised from your own resources, and those of your loving friends and family, now you are responsible for the wise management of “other people’s money.”
You may need to work with people that you do not know well, and people whose priorities are going to be different from yours. Among other things, investors will be wanting a return on their investment sooner rather than later. This can lead to a tug-of-war between you wanting to take more time and investors wanting you to take less.